Blood traces hidden under paint allow an expert witness to find a killer and free five men from suspicion. An unusual gait identifies the murderer of an office worker.

When it becomes obvious that a forensics expert raped and murdered a student, the investigation focuses on a criminology professor Cragen arrested decades earlier for similar crimes, and it’s up…

In Highland, Mich., family members are desperate for answers after their toddler witnesses a ghostly figure walking across a room; Jason Hawes taps into his network of experts, who uncover…