HLN HDTV (HLNHD)

The brutal slayings of a young couple are investigated. Shell casings, paint chips and glass shards lead the police to suspect a white supremacist. (Repeat).

With no forensic evidence inside a murder scene, investigators were baffled. But they suspected that the victim's dog, had witnessed the crime. If she had, forensic scientists would've had some way to find out, what the dog had seen. (Repeat).

A young TV news producer is raped and murdered in her apartment. Police identify two suspects, but both are cleared of any wrongdoing. The case stalls for more than a year, and then investigators turn to Virginia's DNA Databank which houses profiles of more than 8,000 convicted felons, and is the first of its kind in the nation. Comparing the crime scene evidence with the Databank profiles results

The police investigate the shooting of a homicide detective's wife; the officer claims his wife shot herself by accident. (Repeat).

For years, a woman suffered from what appeared to be the unpleasant side effects of lithium, a drug prescribed to treat bipolar disorder. Her search for help led her to numerous doctors and hospitals, and resulted in a 4000-page medical file. When she died, investigators had to determine if her death was due to natural causes, suicide, or murder. (Repeat).

A woman is found dead in a ravine near a jogging path. Crucial crime scene evidence had been washed away by severe thunderstorms. Twice, the trail turned cold. Then, almost 20 years later, an old hat and a chip of stainless steel no longer than a fingernail brought the killer to justice. (Repeat).

The investigation into the murder of an 11-year-old girl, who had been missing for 10 days, is recounted. (Repeat).

A sexual-abuse victim's death is investigated. (Repeat).

For six years, a serial killer prowled the streets of New York City. He wrote letters to police and The New York Post, indicating he would kill twelve people, one for each astrological sign. Forensic astronomy, handwriting analysis, and DNA extracted from the flap of an envelope gave investigators a profile of the killer, and a stroke of luck enabled them to find him. (Repeat).

A possible suicide is investigated. (Repeat).

California police are baffled when an innocent man's DNA is found at the scene of a deadly home invasion. Authorities team with the man's defense attorney. (Repeat).

A young mother is found murdered in her home. From the onset, there are two suspects with ample motive, but there is an unusual interview and security camera footage. (Repeat).

Get the latest news, weather updates, and sports analysis on CNN News Central. Stay informed with all the top stories of the day. (Repeat).

Get the latest news, weather updates, and sports analysis on CNN News Central. Stay informed with all the top stories of the day. (Repeat).

Get the latest news, weather updates, and sports analysis on CNN News Central. Stay informed with all the top stories of the day. (Repeat).

Shocking lies, deceit and bad behavior—all caught on camera. Criminal cases are full of terrifying 911 calls, police interrogations, jail house recordings, body camera and surveillance video. (Repeat).

Shocking lies, deceit and bad behavior, all caught on camera. Criminal cases are full of terrifying 911 calls, police interrogations, jail house recordings, body camera and surveillance video. (Repeat).

Shayna Hubers and Ryan Poston seemed like a match made in heaven, until he ends up dead in a pool of blood, shot in the face. Stunning interrogation tapes leave cops in disbelief and lead investigators to a surprising motive. (Repeat).

Prominent realtor Todd Kohlhepp's double life is exposed when police launch a dramatic rescue of a young woman chained like a dog inside a shipping container on his property. (Repeat).

Eight-year-old Cherish Perrywinkle is lured out of a Walmart by a registered sex offender, but that's just the beginning of a night of terror, all caught on camera. (Repeat).

A fitness instructor was killed while preparing for a morning workout class at a church. Fortunately, CCTV around the area has caught her killer. (Repeat).

A dormant investigation into a young woman's murder is reopened. The police rely on a diary, a child's memory and a forensic psychologist to break the case. (Repeat).

The investigation into the apparent suicide of a retired police officer takes an unexpected turn when the medical examiner rules the death a homicide. (Repeat).

Experts use forensic science to solve mysterious crimes. They analyze evidence like fingerprints and DNA to uncover the truth and bring justice. (Repeat).

Two different men called police to report the same murder of a young woman. When the case's other anomalies stall the police, a few tiny seeds and a discarded candy wrapper help expose the killer. [also marked as S8:E20] (Repeat).

A mysterious death in Mexico is investigated by the victim's insurance company. (Repeat).

The police investigate a pipe-bomb incident that took the life of a young man and injured his mother. (Repeat).