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.

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

Detectives follow a digital trail to uncover what happened to a young mom.

When two girls go missing, their devices hold vital clues for detectives.

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

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

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.

The identity of the killer responsible for stabbing 22-year-old Maurice Skeen during a street brawl in Albany, NY, lies hidden in chaos; facing an almost total lack of physical evidence, detectives must decode the digital to unmask the perpetrator.

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.

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.

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.

Two men are shot in the middle of the night, and the only witness has no idea who the gunman is. Omaha PD detectives turn to digital forensics, hoping hidden data buried in the victims' cell phones will help track down the killer.

When family man Ricky Saxton is found murdered, investigators turn to a forensic data specialist at the FBI to help locate a missing piece of the puzzle; a deleted snapshot buried deep within the data leads them to Ricky's killer.

When police find 64-year-old nurse Athena Valentiny brutally murdered in her home, investigators follow the digital trail her killer left behind; they cross-reference the digital evidence with surveillance video to reveal who took her life.