A detective enters the digital world to catch a vicious child killer.
Police hope a fitness tracker will solve the mystery behind a brutal death.
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 leads authorities to 3-year-old Brendan Creato's killer.
Detectives unveil the truth behind a missing woman's digital trail.