

While investigators uncover a twist in one murder case, digital evidence raises questions in another.

A killer records himself tampering with the weapon; phone data exposes betrayal.

A 9-1-1 call captures the final moments of Collin Turner; CCTV helps reveal Mary Kay Wohlfarth's killer.

CCTV and GPS find the killer of Jasmine Pace; digital forensics reveals Megan Newton's killer.