In 1993, Jeanie Childs was found stabbed more than 60 times in her Minneapolis apartment. Bloody footprints and unknown DNA left investigators without answers until a 2015 cold-case review and public DNA database finally pointed to a suspect.
"In Minnesota here, people are not committing crimes a lot of times with the socks and shoes off," said a forensic scientist about footprints left in the victim's blood.
During their first date, Leslie Reeves and Chris Smith were ambushed in his Illinois home – both shot in the head. A crime scene investigator described it as one of the most horrific crime scenes he's been to.