A North Carolina scientist is brought to a hospital for suspected food poisoning. Toxicology tests show high levels of arsenic in his body and he's found dead days later.
Two women die in fires right after doing laundry.
In Illinois, medical research student disappears from her room.
Was the killing of an attractive young couple done by a hired assassin?
A Minnesota State Park employee turns up dead, baffling investigators for years.
A couple vacationing in Ocean City, Maryland mysteriously disappears after a seemingly typical night on the town. Was the other couple they met that night involved?
A little girl is witness to her mother's murder.
A woman's body is found in the water.
A woman goes missing after a night of gambling. More than one man is suspected, but DNA evidence points to the killer.