When four teenagers are murdered in an otherwise peaceful suburban town, their killings go unsolved for three years until a composite sketch sparks new leads.
After a young college student's death is ruled a homicide, police immediately suspect the victim's boyfriend, but DNA points them in a different direction.
When detectives investigate a middle-aged man's murder, they determine that robbery may not have been the motive after discovering a mysterious greeting card.
A son finds his father dead in their home and calls 911, but when ballistics clear the only suspect, police have to rely on DNA evidence to find the killer.
Police suspect the pilot husband of a flight attendant in her murder when a witness says he saw them out in the middle of snowstorm except her body is missing.
A quaint English town's innocence is forever lost following the brutal rape and murder of 15-year-old Lynda Mann, and the more recent attack on Dawn Ashworth.
On the side of a remote driveway out in the country, a woman is found murdered and her case goes cold until evidence is found during an unrelated case.
A farmhand tragically dies in a seemingly accidental explosion, but after further investigation of the blast site, authorities uncover the remnants of a bomb.
A promising young college student is found stabbed to death in her apartment and a bloody shoeprint soon points to a surprising killer hidden in plain sight.
The scene of a brutal murder is marred by spray painted threats all over the walls and authorities discover a history of death threats that leads to the killer.
A Texas teen and her boyfriend are savagely attacked on Valentine's Day, causing her death while boyfriend escapes - a case that goes cold for 50 years.
When the body of a young criminology student is discovered wrapped in a blanket along an abandoned road in Brooklyn, the authorities suspect an unusual culprit.
When four teenagers are murdered in an otherwise peaceful suburban town, their killings go unsolved for three years until a composite sketch sparks new leads.
After a young college student's death is ruled a homicide, police immediately suspect the victim's boyfriend, but DNA points them in a different direction.
When detectives investigate a middle-aged man's murder, they determine that robbery may not have been the motive after discovering a mysterious greeting card.
A son finds his father dead in their home and calls 911, but when ballistics clear the only suspect, police have to rely on DNA evidence to find the killer.
Police suspect the pilot husband of a flight attendant in her murder when a witness says he saw them out in the middle of snowstorm except her body is missing.
A quaint English town's innocence is forever lost following the brutal rape and murder of 15-year-old Lynda Mann, and the more recent attack on Dawn Ashworth.
A boy complains of fever and digestive issues a few days before he is scheduled to attend space camp, and it turns out to be the result of a deadly infection.
Ten bodies are found in different places, initiating a seven-month investigation that cracks when a girl escapes the killer with a carpet fiber on her body.
Careful analysis of the crime scene reveals a soil sample that proves instrumental in solving the case of a married couple who disappeared from their home.
A dense patch of fog causes the most devastating automobile accident in American history, and police aim to find out if it was a naturally occurring phenomenon.
A woman goes missing from her Arizona home while her husband is on vacation in California, and the results of the investigation are particularly surprising.
A waitress complains of flu-like symptoms but doctors can't determine what is causing the condition and then her sons begin suffering from the same illness.
Two people die inexplicably after taking the same over-the-counter pain relief medication, and investigators find a lethal dose of cyanide on the pills.