In a shocking moment in the investigation, while Monique and Spencer are out of town at the Big 10 Championship game on December 6, McKee is captured on video entering the "curtilage" of the Tepe home.

"Curtilage" is the property immediately surrounding a home and is considered an extension of the dwelling for Fourth Amendment purposes.

In the second half of the championship game, Monique excuses herself and returns to the hotel room. This is at the same time McKee is at the Tepe home. Asked "why" she left the game, Spencer tells friends Monique is upset about something involving her ex-husband.

During the time of the homicides, McKee's phone is left at St. Anthony Hospital in Rockford and shows no activity for about 17 hours from December 29 until after noon on December 30.

Friends and family tell investigators how Monique's ex-husband McKee had been abusive and made numerous threats on her life during and after their marriage.

Friends and family also tell investigators that McKee would force Monique into unwanted sex and strangulation. McKee tells Monique he can kill her any time he wants; he will buy the house right next door to her, and she is always going to be his wife.

Joining Nancy Grace:

• Troy Slaten - Los Angeles Criminal Defense Attorney, Slaten Lawyers; X @TroySlaten
• Dr. Bethany Marshall -  Psychoanalyst, Author: "Deal Breaker," and featured in hit show "Paris in Love" on Peacock; Instagram & TikTok: drbethanymarshall, X: @DrBethanyLive
• Paul Szych - Former Police Commander (Albuquerque, NM), APD Domestic Violence and Stalking Unit, Author of “Stop Him from Killing Them” on Amazon; X: WorkPlaceThreat  
• Dr. Thomas Coyne - Chief Medical Examiner, District 2 Medical Examiner's Office, State of Florida; Forensic Pathologist, Neuropathologist, Toxicologist; X: @DrTMCoyne
• Joseph Scott Morgan - Professor of Forensics: Jacksonville State University, Author of "Blood Beneath My Feet," and Host: "Body Bags with Joseph Scott Morgan;" X @JoScottForensic
• Yelena Mandenberg - News Reporter for 'The Mirror', the 'Irish Star' and 'The Express;' X: @ymand123
•   Dave Mack - Investigative Reporter, 'Crime Stories'