In a new record for forensic investigators, they're able to determine the killer of Peggy Beck with genealogy, 56 years after the crime. A victory for sure, but even though they found their suspect, they had a surprise waiting just around the corner...

Genealogy Identified a Killer but Texas Got Him First
28:59

Coincidence Means Nothing: Serial Killer Caught in 45-Year-Old Cold Case
31:47

Update and New Evidence on the Long Island Serial Killer
14:11