A woman is found stabbed to death in her bathtub and her abusive ex-boyfriend becomes a suspect; footprints, including one on a hamburger bun, hold the key to solving the murder.

A deaf woman, caught up in a love triangle, is brutally murdered. Forensic scientists subpoena Yahoo records and find evidence at the assailant's residence.

It appeared the victim had accidentally fallen and hit her head at the bottom of the stairs. But the odd position of her shoes and the absence of blood spatter led police to suspect the scene had been staged... and Luminol proved they were right.

As she left choir practice, the woman was gunned down in the church parking lot. Her husband became the prime suspect - particularly when police learned he found out just a month earlier that his wife had been cheating on him for three years. Originally aired as Season 14, Episode 4.

A man's truck slips off the jack, crushing him and starting a fire. But the forensic evidence makes detectives wonder: was the man who was killed really the owner of the truck?

A woman is stabbed to death in her bed. Investigators become suspicious after learning of a series of close-call incidents in her life.

A man's apparent suicide by drinking antifreeze turns into a murder investigation when forensic evidence seems to indicate the poison might have been administered by someone else.

A serial killer targets gay people in New York and New jersey. Can forensic evidence lead police to the killer?

A pregnant woman is murdered in her home, and suspicion logically falls on her fiancé. But shoe prints and ballistic testing prove otherwise.

A Virginia teenager is murdered and her body is found in a ravine; investigators discover shell casings and a cigarette filter nearby, along with a shoe impression on her body.

The bodies of a woman and her two daughters are found floating in Tampa Bay, Florida. Police discover a handwritten note in their car and hope it will solve the triple murder.

In an upscale Texas neighborhood, four young people are brutally murdered; a neighbor's eyewitness account helps produce composite sketches of two suspects dressed in black.

When a Texas college student is found murdered in her apartment, three men are under suspicion: The victim's boyfriend, a neighbor, and a custodian. Investigators must determine which man is the killer.

A report of a fire leads investigators into a bizarre scene: A couple is found fatally shot inside their home, while another victim is found executed in his car. E-mail tracking takes police into the seductive world of Internet dating.

In 2003, Kathy Lorick was killed on a Concord, California jogging trail in the middle of the day while talking to her husband on her cell phone. The evidence from Kathy's cell phone records and search dogs lead nowhere. Nine days later, a witness tells police about a chance encounter and cigarette butts that contain the killer's DNA. Originally aired as Season 14, Episode 15.

Investigators are able to identify the gun used in a homicide by matching it to a bullet fired more than twenty years before.

The body of a young mother was found in a suitcase in a Texas landfill. The suitcase leads investigators to Rosendo Rodriguez who had an overwhelming amount of forensic evidence against him. But upon an extensive search of the same landfill, Rogers' decomposing body was also found in a suitcase. Originally aired as Season 14, Episode 17.

A woman going through a bitter divorce is reported missing the morning after 9/11. Investigators are frustrated until a suspect makes a verbal mistake.

A set of keys found at the crime scene leads investigators to a woman's killer.

Two family members are suspects in the shooting of a funeral director. Does the forensic evidence show which one was the killer?

A man becomes a suspect after he discovers his common-law wife sexually assaulted and murdered in her apartment. But when a young woman is raped three years later, it becomes clear that the same person committed both crimes.