Investigators zero in on a suspect of a woman found in her bedroom with over 100 stab wounds.
Police follow the bloody trail of footsteps to find the killer of a man and rapist of his girlfriend.
Human remains found in a sewer are identified as a 14-year old boy who was reported missing.
Seven rapes and two murders over the course of eight years; after a twelve year absence the Bike Path Killer returns.
Twenty year old ranger beat to death in a park office and investigators use science to track down the killer.
The hunt for a young girl's killer lasted months and the results are shocking.
DNA samples taken from three suspects in a 1980 murder case are compared to DNA evidence from the victim with startling results.
When a man is found dead by poisoning, the case takes a strange twist when one prime suspect attempts to kill the other.
A pregnant woman is found dead with her fetus removed through a crude cesarean section.
A woman is found tied to a bed with slashes across her body and a man is found with three gunshot wounds on the floor next to her.
A woman is seen being forced into her car by an unknown man on a surveillance video.
A murder is disguised as a carjacking.
A church employee arrives at work and discovers a woman's body; the pastor believes it was a random killing but detectives suspect differently.
A 4-year-old boy runs into his church, proclaiming to the volunteers that his grandparents are melting.
A dark secret brought forward solves a cold case.
A 44-year-old mother of two is found dead in her art and frame shop; detectives uncover a link between the killer and the victim.
A millionaire, his wife and their daughter are found dead in the California home; police spend three years investigating the crime and make an arrest the shocks many people.
The body of Summer Baldwin is found inside a suitcase.
Police find a word written in blood near a woman's lifeless body.
A woman's parents alert police when she goes missing; friend's of the victim tell investigators there was another man in her life besides her estranged husband.
A young mother's body is found days after she disappears; the husband is suspected of the murder.
An 18-year-old woman's body is found in a makeshift grave three weeks after her disappearance; the woman's online journal reveals a love triangle full of conflict.
A surprise tip helps police solve a six-month old murder investigation.
Three matching suitcases containing male body parts are found off the coast of Virginia Beach, leading investigators to the victim's wife.
Investigators have no leads to follow when a crime scene yields no physical evidence.
A serial killer letter claims responsibility for a woman's death but the evidence suggests otherwise.
Two people are dead and one injured after a series of package bombs go off in Salt Lake City.
A man contacts the FBI after his son is kidnapped; during the investigation the FBI uncovers evidence of an international kidnapping ring.
A woman's family refuses to believe she committed suicide and abandon her children.
A missing woman's husband claims she ran off with another man.
A popular ophthalmologist is found murdered.
A teenager claims an intruder killed her parents.