A grizzly murder scene leaves forensic investigators to try and piece together what could have happened to a couple in a quiet upstate New York community.
A college co-ed is found stabbed to death in her home.
A burning body is found on the side of a Baltimore highway. Police have few clues to work with, but enough bodily evidence remains to create a composite sketch.
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.