When single dad David Heisler goes missing, digital clues lead detectives into the desert, but the trail stops cold. Investigators ask digital forensics experts to help them unravel this twisted mystery and reveal the truth of what happened.

Digital forensics lead investigators to 3-year-old Brendan Creato's killer.

When 12-year-old Aynis Vargas dies in a seemingly random attack on a party, investigators piece together clues from social media, cell phone data and surveillance footage to try to get justice for Aynis, her family, and the whole community.

A detective enters the digital world to catch a vicious child killer.

When widow Valena Shepherd is found dead at home, police suspect foul play; investigators follow digital clues that suggest Valena knew her killer and hope the data contained within a digital heart monitor device pinpoints the perpetrator.

Detectives uncover the truth behind a missing woman's digital trail.

When a co-worker finds 67-year-old Karen Navarra dead in a bloody scene at her San Jose, California, home, the physical evidence baffles police, until they discover data from Navarra's FitBit watch to solve the brutal crime.

After the murder of young mother Morgan Ashlye Fox, investigators don't have much physical evidence; with numerous suspects in the frame, digital evidence reveals the secrets of a monster hiding in plain sight.