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Work a cold case alongside investigator Sheryl “Mac” McCollum, Director of the Cold Case Investigative Research Institute. Every week, Sheryl dives into her cold case files alongside accomplished guests to look for clues into unsolved murders, missing people, and more. This ain’t just a podcast but a war room. Sheryl opens her cold case files, her heart and her little black book! You will quickly realize Zone 7 is not a place but a lifestyle!

Work a cold case alongside investigator Sheryl “Mac” McCollum, Director of the Cold Case Investigative Research Institute. Every week, Sheryl dives into her cold case files alongside accomplished guests to look for clues into unsolved murders, missing people, and more. This ain’t just a podcast but a war room. Sheryl opens her cold case files, her heart and her little black book! You will quickly realize Zone 7 is not a place but a lifestyle!

Zone 7 with Sheryl McCollum

Introducing: Zone 7 with Sheryl McCollum

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/c4ce65c3-7fe3-4d81-a4bb-af6a0133fb85/transcript

In this week’s episode of Zone 7, Sheryl McCollum talks with retired FBI special agent Jodene Weber about the parallels in their careers and the many times their paths nearly crossed before they officially met. Jodene reflects on the cases that shaped her years in the FBI, from piecing together the timeline of the Olympic Park bombing through crowd photographs to processing debris at the Pentagon after the 9/11 attacks. She shares what investigations of that scale demand from the people working them, and why citizen tips, careful documentation, and keen observation can make all the difference in solving a case.



References & Further Reading:

The Only Plane in the Sky: An Oral History of 9/11 by Garrett M. Graff

The Day the World Came to Town: 9/11 in Gander, Newfoundland by Jim DeFede

The Bald-Faced Deception by Jodene Weber

Come From Away



Highlights:

(0:00) Sheryl McCollum welcomes Jodene Weber to Zone 7, and traces the overlaps in their careers

(2:45) How Nancy Drew, Patricia Cornwell, and a love of reading shaped Jodene’s investigative instincts

(4:45) Why strong writing and careful documentation can make or break a case

(8:30) Jodene’s journalism career and FBI recruitment story

(11:45) Jodene recalls joining the Olympic Park bombing investigation

(13:00) How investigators used crowd photos and the Olympic broadcast screen to build a timeline of events

(15:00) NASA image enhancement, suspect details, and the Birmingham bombing tip that helped investigators identify Eric Rudolph

(20:00) Citizen tips, false leads, and the kind of public memory that could help solve the Nancy Guthrie case

(24:00) Sheryl recalls her sister’s diverted flight to Gander, Newfoundland, and the kindness shown to stranded passengers after 9/11

(27:30) Inside the Pentagon response: fire, debris, remains, and aircraft evidence, and the emotional weight at the scene

(33:30) Jodene describes the long shifts and the exhausting rhythm of sorting through the 9/11 aftermath

(35:15) The generosity shown after 9/11 in Gander and by the volunteers who supported recovery teams

(39:30) Ongoing health issues tied to 9/11 exposure and Sheryl’s closing quote



Guest Bio:

Jodene Weber is a retired FBI agent, former journalist, author, and podcast host whose work brings together investigative experience and clear storytelling. She is the author of The Bald-Faced Deception and hosts the true crime podcast Caught In My Web.



Enjoying Zone 7? Leave a rating and review where you listen to podcasts. Your feedback helps others find the show and supports the mission to educate, engage, and inspire.



Sheryl “Mac” McCollum is an active crime scene investigator for a Metro Atlanta Police Department and the director of the Cold Case Investigative Research Institute, which partners with colleges and universities nationwide. With more than 4 decades of experience, she has worked on thousands of cold cases using her investigative system, The Last 24/361, which integrates evidence, media, and advanced forensic testing.

Her work on high-profile cases, including The Boston Strangler, Natalie Holloway, Tupac Shakur and the Moore’s Ford Bridge lynching, led to her Emmy Award for CSI: Atlanta and induction into the National Law Enforcement Hall of Fame in 2023.



Social Links:

Email: coldcase2004@gmail.com

X: @ColdCaseTips

Facebook: @sheryl.mccollum

Instagram:@officialzone7podcast

TikTok: @Sheryl.McCollum



Preorder Sheryl’s upcoming book, Swans Don’t Swim in a Sewer: Solving the Cold Case of the Flint River Killer’s Daughter, releasing May 12, 2026.

 

In this week&rsquo;s episode of Zone 7, Sheryl McCollum talks with retired FBI special agent Jodene&nbsp;Weber about the parallels in their careers and the many times their paths nearly crossed before&nbsp;they officially met. Jodene reflects on the cases that shaped her years in the FBI, from piecing&nbsp;together the timeline of the Olympic Park bombing through crowd photographs to processing&nbsp;debris at the Pentagon after the 9/11 attacks. She shares what investigations of that scale&nbsp;demand from the people working them, and why citizen tips, careful documentation, and keen&nbsp;observation can make all the difference in solving a case. 
References &amp; Further Reading:
<a href="https://www.amazon.com/Only-Plane-Sky-Oral-History/dp/150118220X">The Only Plane in the Sky: An Oral History of 9/11</a> by Garrett M. Graff
<a href="https://www.amazon.com/Day-World-Came-Town-Newfoundland/dp/0060559713">The Day the World Came to Town: 9/11 in Gander, Newfoundland</a> by Jim DeFede
<a href="https://www.amazon.com/Bald-Faced-Deception-Jodene-Weber-ebook/dp/B0F1TW3GW5">The Bald-Faced Deception</a> by Jodene Weber
<a href="https://comefromaway.com/">Come From Away</a> 
Highlights:
(0:00) Sheryl McCollum welcomes Jodene Weber to Zone 7, and traces the overlaps in&nbsp;their careers
(2:45) How Nancy Drew, Patricia Cornwell, and a love of reading shaped Jodene&rsquo;s&nbsp;investigative instincts
(4:45) Why strong writing and careful documentation can make or break a case
(8:30) Jodene&rsquo;s journalism career and FBI recruitment story
(11:45) Jodene recalls joining the Olympic Park bombing investigation
(13:00) How investigators used crowd photos and the Olympic broadcast screen to build&nbsp;a timeline of events
(15:00) NASA image enhancement, suspect details, and the Birmingham bombing tip&nbsp;that helped investigators identify Eric Rudolph
(20:00) Citizen tips, false leads, and the kind of public memory that could help solve the&nbsp;Nancy Guthrie case
(24:00) Sheryl recalls her sister&rsquo;s diverted flight to Gander, Newfoundland, and the&nbsp;kindness shown to stranded passengers after 9/11
(27:30) Inside the Pentagon response: fire, debris, remains, and aircraft evidence, and&nbsp;the emotional weight at the scene
(33:30) Jodene describes the long shifts and the exhausting rhythm of sorting through&nbsp;the 9/11 aftermath
(35:15) The generosity shown after 9/11 in Gander and by the volunteers who supported&nbsp;recovery teams
(39:30) Ongoing health issues tied to 9/11 exposure and Sheryl&rsquo;s closing quote 
Guest Bio:
Jodene Weber is a retired FBI agent, former journalist, author, and podcast host whose work&nbsp;brings together investigative experience and clear storytelling. She is the author of The Bald-Faced Deception and hosts the true crime podcast Caught In My Web. 
Enjoying Zone 7? Leave a rating and review where you listen to podcasts. Your feedback helps&nbsp;others find the show and supports the mission to educate, engage, and inspire. 
Sheryl &ldquo;Mac&rdquo; McCollum is an active crime scene investigator for a Metro Atlanta Police&nbsp;Department and the director of the Cold Case Investigative Research Institute, which partners&nbsp;with colleges and universities nationwide. With more than 4 decades of experience, she has&nbsp;worked on thousands of cold cases using her investigative system, The Last 24/361, which&nbsp;integrates evidence, media, and advanced forensic testing.
Her work on high-profile cases, including The Boston Strangler, Natalie Holloway, Tupac Shakur&nbsp;and the Moore&rsquo;s Ford Bridge lynching, led to her Emmy Award for CSI: Atlanta and induction&nbsp;into the National Law Enforcement Hall of Fame in 2023. 
Social Links:
Email: coldcase2004@gmail.com
X: @ColdCaseTips
Facebook: @sheryl.mccollum
Instagram: @officialzone7podcast
TikTok: @Sheryl.McCollum 
Preorder Sheryl&rsquo;s upcoming book, Swans Don&rsquo;t Swim in a Sewer: Solving the Cold Case of the Flint River Killer&rsquo;s Daughter, releasing May 12, 2026.
&nbsp;

When Two Investigators’ Paths Cross: Olympic Park Bombing, 9/11, and the Power of Public Tips

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/cb5f139d-d7d4-4819-ac1e-b43200e5f397/transcript

In this week’s episode of Zone 7, Sheryl McCollum welcomes Julie Grant for a special Legend Series conversation about her path from journalism to the courtroom and the commitment to justice that drives her today. As a former prosecutor and Court TV host, Julie discusses her advocacy for domestic violence survivors, explaining how systemic failures, including those seen in the Gabby Petito case, leave victims vulnerable. She also shares her philosophy on justice-centered prosecution, arguing that being a “minister of justice” requires the discernment to hold dangerous predators accountable while offering grace and second chances to those who have simply lost their way.



Highlights:

(0:00) Sheryl McCollum welcomes Julie Grant to Zone 7 and reflects on her impact in true crime media

(2:15) Julie’s background in prosecution, legal journalism, teaching, and victims’ rights advocacy

(9:45) The balance between journalism and law, and the path that took Julie from the newsroom to law school

(13:15) What public service taught Julie about prosecution, law enforcement, and the pursuit of justice

(15:30) The domestic violence cases that stayed with Julie most, her advocacy work, and the realities survivors face after they leave

(22:15) How safety planning can protect victims at the most dangerous point in an abusive relationship

(23:45) The Gabby Petito case, missed warning signs, and the failures that stand out

(25:45) Julie’s philosophy of prosecution, second chances, and why justice is not the same as winning

(29:45) A tragic Georgia case and what it reveals about intent, accountability, and prosecutorial discretion

(32:00) Why future prosecutors need empathy, perspective, and a case-by-case view of justice



Guest Bio:

Julie Grant is a former prosecutor, Court TV host, legal journalist, and law professor at Emory Law School. She has long been an advocate for victims’ rights, including domestic violence prevention, and also serves on the faculty of the National Institute for Trial Advocacy

Enjoying Zone 7? Leave a rating and review where you listen to podcasts. Your feedback helps others find the show and supports the mission to educate, engage, and inspire.



Sheryl “Mac” McCollum is an active crime scene investigator for a Metro Atlanta Police Department and the director of the Cold Case Investigative Research Institute, which partners with colleges and universities nationwide. With more than 4 decades of experience, she has worked on thousands of cold cases using her investigative system, The Last 24/361, which integrates evidence, media, and advanced forensic testing.

Her work on high-profile cases, including The Boston Strangler, Natalie Holloway, Tupac Shakur and the Moore’s Ford Bridge lynching, led to her Emmy Award for CSI: Atlanta and induction into the National Law Enforcement Hall of Fame in 2023.



Social Links:

Email: coldcase2004@gmail.com

Twitter: @ColdCaseTips

Facebook: @sheryl.mccollum

Instagram:@officialzone7podcast



Preorder Sheryl’s upcoming book, Swans Don’t Swim in a Sewer: Lessons in Life,Justice, and Joy from a Forensic Scientist, releasing May 12, 2026.

https://www.simonandschuster.com/books/Swans-Dont-Swim-in-a-Sewer/Sheryl-Mac-McCollum/9798895652824

 

In this week&rsquo;s episode of Zone 7, Sheryl McCollum welcomes Julie Grant for a special Legend&nbsp;Series conversation about her path from journalism to the courtroom and the commitment to&nbsp;justice that drives her today. As a former prosecutor and Court TV host, Julie discusses her&nbsp;advocacy for domestic violence survivors, explaining how systemic failures, including those&nbsp;seen in the Gabby Petito case, leave victims vulnerable. She also shares her philosophy on&nbsp;justice-centered prosecution, arguing that being a &ldquo;minister of justice&rdquo; requires the discernment&nbsp;to hold dangerous predators accountable while offering grace and second chances to those who&nbsp;have simply lost their way. 
Highlights:
(0:00) Sheryl McCollum welcomes Julie Grant to Zone 7 and reflects on her impact in&nbsp;true crime media
(2:15) Julie&rsquo;s background in prosecution, legal journalism, teaching, and victims&rsquo; rights&nbsp;advocacy
(9:45) The balance between journalism and law, and the path that took Julie from the&nbsp;newsroom to law school
(13:15) What public service taught Julie about prosecution, law enforcement, and the&nbsp;pursuit of justice
(15:30) The domestic violence cases that stayed with Julie most, her advocacy work,&nbsp;and the realities survivors face after they leave
(22:15) How safety planning can protect victims at the most dangerous point in an&nbsp;abusive relationship
(23:45) The Gabby Petito case, missed warning signs, and the failures that stand out
(25:45) Julie&rsquo;s philosophy of prosecution, second chances, and why justice is not the&nbsp;same as winning
(29:45) A tragic Georgia case and what it reveals about intent, accountability, and&nbsp;prosecutorial discretion
(32:00) Why future prosecutors need empathy, perspective, and a case-by-case view of&nbsp;justice 
Guest Bio:
Julie Grant is a former prosecutor, Court TV host, legal journalist, and law professor at Emory&nbsp;Law School. She has long been an advocate for victims&rsquo; rights, including domestic violence&nbsp;prevention, and also serves on the faculty of the National Institute for Trial Advocacy
Enjoying Zone 7? Leave a rating and review where you listen to podcasts. Your feedback helps&nbsp;others find the show and supports the mission to educate, engage, and inspire. 
Sheryl &ldquo;Mac&rdquo; McCollum is an active crime scene investigator for a Metro Atlanta Police&nbsp;Department and the director of the Cold Case Investigative Research Institute, which partners&nbsp;with colleges and universities nationwide. With more than 4 decades of experience, she has&nbsp;worked on thousands of cold cases using her investigative system, The Last 24/361, which&nbsp;integrates evidence, media, and advanced forensic testing.
Her work on high-profile cases, including The Boston Strangler, Natalie Holloway, Tupac Shakur&nbsp;and the Moore&rsquo;s Ford Bridge lynching, led to her Emmy Award for CSI: Atlanta and induction&nbsp;into the National Law Enforcement Hall of Fame in 2023. 
Social Links:
Email: coldcase2004@gmail.com
Twitter: @ColdCaseTips
Facebook: @sheryl.mccollum
Instagram: @officialzone7podcast 
Preorder Sheryl&rsquo;s upcoming book, Swans Don&rsquo;t Swim in a Sewer: Lessons in Life,Justice, and Joy from a Forensic Scientist, releasing May 12, 2026.
<a href="https://www.simonandschuster.com/books/Swans-Dont-Swim-in-a-Sewer/Sheryl-Mac-McCollum/9798895652824">https://www.simonandschuster.com/books/Swans-Dont-Swim-in-a-Sewer/Sheryl-Mac-Mc</a><a href="https://www.simonandschuster.com/books/Swans-Dont-Swim-in-a-Sewer/Sheryl-Mac-McCollum/9798895652824">Collum/9798895652824</a>
&nbsp;

Legend Series: Julie Grant on Prosecution, Victims’ Rights, and Justice

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/1af58dff-9d70-4c5c-9267-b42b00f3789c/transcript

In this week’s episode of Zone 7, Sheryl McCollum talks with forensic DNA expert Suzanna Ryan about how powerful DNA evidence can be and why it is so often misunderstood. They discuss how DNA is analyzed, how touch DNA and mixtures can complicate a case, and how newer tools like genetic genealogy and next-generation sequencing are changing the field. Using the Nancy Guthrie case as an example, Suzanna and Sheryl also explain how private forensic labs can support complex investigations, where their role differs from the FBI, and how CODIS limitations can shape the process.



Highlights:

(0:00) Sheryl McCollum welcomes Suzanna Ryan to Zone 7

(2:30) The four basic steps of DNA analysis and how evidence is processed in the lab

(3:45) The Nancy Guthrie case, private lab testing, and why sending evidence outside the FBI is not a red flag

(7:45) What cell-free DNA is, why the term “touch DNA” can be misleading, and how secondary transfer works

(9:45) DNA mixtures and how multiple contributors can be found on a single piece of evidence

(14:00) Why clothing evidence should always be collected and packaged separately

(15:45) How long seminal fluid can remain detectable and when Y-STR testing becomes useful

(21:00) Why private labs cannot directly access CODIS, how that creates bottlenecks, and legislative changes in the works

(27:30) Genetic genealogy, CODIS, and familial searching

(30:15) The future of DNA analysis, including next-generation sequencing and emerging forensic tools



Guest Bio:

Suzanna Ryan is a forensic serologist and DNA analyst with more than two decades of experience in DNA casework, technical review, and forensic consulting. She is the laboratory director of Pure Gold Forensics and has worked in both private and public forensic laboratories throughout her career. Suzanna has been qualified and testified as an expert in forensic serology and DNA analysis more than 140 times.



Enjoying Zone 7? Leave a rating and review where you listen to podcasts. Your feedback helps others find the show and supports the mission to educate, engage, and inspire.



Sheryl “Mac” McCollum is an active crime scene investigator for a Metro Atlanta Police Department and the director of the Cold Case Investigative Research Institute, which partners with colleges and universities nationwide. With more than 4 decades of experience, she has worked on thousands of cold cases using her investigative system, The Last 24/361, which integrates evidence, media, and advanced forensic testing.



Her work on high-profile cases, including The Boston Strangler, Natalie Holloway, Tupac Shakur and the Moore’s Ford Bridge lynching, led to her Emmy Award for CSI: Atlanta and induction into the National Law Enforcement Hall of Fame in 2023.



Social Links:

Email: coldcase2004@gmail.com

Twitter: @ColdCaseTips

Facebook: @sheryl.mccollum

Instagram:@officialzone7podcast



Preorder Sheryl’s upcoming book, Swans Don’t Swim in a Sewer: Lessons in Life, Justice, and Joy from a Forensic Scientist, releasing May 12, 2026.

https://www.simonandschuster.com/books/Swans-Dont-Swim-in-a-Sewer/Sheryl-Mac-McCollum/9798895652824

 

In this week&rsquo;s episode of Zone 7, Sheryl McCollum talks with forensic DNA expert Suzanna&nbsp;Ryan about how powerful DNA evidence can be and why it is so often misunderstood. They&nbsp;discuss how DNA is analyzed, how touch DNA and mixtures can complicate a case, and how&nbsp;newer tools like genetic genealogy and next-generation sequencing are changing the field.&nbsp;Using the Nancy Guthrie case as an example, Suzanna and Sheryl also explain how private&nbsp;forensic labs can support complex investigations, where their role differs from the FBI, and how&nbsp;CODIS limitations can shape the process. 
Highlights:
(0:00) Sheryl McCollum welcomes Suzanna Ryan to Zone 7
(2:30) The four basic steps of DNA analysis and how evidence is processed in the lab
(3:45) The Nancy Guthrie case, private lab testing, and why sending evidence outside&nbsp;the FBI is not a red flag
(7:45) What cell-free DNA is, why the term &ldquo;touch DNA&rdquo; can be misleading, and how&nbsp;secondary transfer works
(9:45) DNA mixtures and how multiple contributors can be found on a single piece of&nbsp;evidence
(14:00) Why clothing evidence should always be collected and packaged separately
(15:45) How long seminal fluid can remain detectable and when Y-STR testing becomes&nbsp;useful
(21:00) Why private labs cannot directly access CODIS, how that creates bottlenecks,&nbsp;and legislative changes in the works
(27:30) Genetic genealogy, CODIS, and familial searching
(30:15) The future of DNA analysis, including next-generation sequencing and emerging&nbsp;forensic tools 
Guest Bio:
Suzanna Ryan is a forensic serologist and DNA analyst with more than two decades of&nbsp;experience in DNA casework, technical review, and forensic consulting. She is the laboratory&nbsp;director of Pure Gold Forensics and has worked in both private and public forensic laboratories&nbsp;throughout her career. Suzanna has been qualified and testified as an expert in forensic&nbsp;serology and DNA analysis more than 140 times. 
Enjoying Zone 7? Leave a rating and review where you listen to podcasts. Your feedback helps&nbsp;others find the show and supports the mission to educate, engage, and inspire. 
Sheryl &ldquo;Mac&rdquo; McCollum is an active crime scene investigator for a Metro Atlanta Police&nbsp;Department and the director of the Cold Case Investigative Research Institute, which partners&nbsp;with colleges and universities nationwide. With more than 4 decades of experience, she has&nbsp;worked on thousands of cold cases using her investigative system, The Last 24/361, which&nbsp;integrates evidence, media, and advanced forensic testing. 
Her work on high-profile cases, including The Boston Strangler, Natalie Holloway, Tupac Shakur&nbsp;and the Moore&rsquo;s Ford Bridge lynching, led to her Emmy Award for CSI: Atlanta and induction&nbsp;into the National Law Enforcement Hall of Fame in 2023. 
Social Links:
Email: coldcase2004@gmail.com
Twitter: @ColdCaseTips
Facebook: @sheryl.mccollum
Instagram: @officialzone7podcast 
Preorder Sheryl&rsquo;s upcoming book, Swans Don&rsquo;t Swim in a Sewer: Lessons in Life, Justice, and Joy from a Forensic Scientist, releasing May 12, 2026.
<a href="https://www.simonandschuster.com/books/Swans-Dont-Swim-in-a-Sewer/Sheryl-Mac-McCollum/9798895652824">https://www.simonandschuster.com/books/Swans-Dont-Swim-in-a-Sewer/Sheryl-Mac-Mc</a><a href="https://www.simonandschuster.com/books/Swans-Dont-Swim-in-a-Sewer/Sheryl-Mac-McCollum/9798895652824">Collum/9798895652824</a>
&nbsp;

DNA 101: Understanding Forensic DNA Evidence with Lab Director Suzanna Ryan

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/65c7fd9e-7f15-406b-ab94-b42400ed19f8/transcript

Introducing: Zone 7 with Sheryl McCollum

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