TV Guide Crime & Investigation Network Saturday

A man is attacked by his girlfriend, and paramedics rush to provide help; a report of gunshots being fired send two first responders to rescue a man.

An opioid epidemic sweeps the nation, and emergency teams try to help; a heatwave across the south causes a man to pass out from heat exhaustion.

A gunshot wound to the chest cavity forces a medical team to race the clock; an empty parking lot is the scene where two medics treat a drunk patient.

A troubled patient with schizophrenia struggles to find proper treatment, and two first responders try their best to show him the care he has always needed.

A man is shot by a trusted acquaintance, and first responders are on standby until the shooter is taken into custody before they are able to provide aide.

A brawl erupts inside an ambulance when an overdose patient wakes up; two first responders rush to the scene of a burning motorcycle crash.

Cindy Brown, the ex-wife of serial killer Bobby Joe Long, reveals how the man she fell in love with as a child committed unknowable crimes.

The daughter of Keith Hunter Jesperson, infamously known as the "Happy Face Killer," shares her own personal story as the daughter of a serial killer.

The son of Drew Peterson, arrested for the murder of his third wife, shares memories of growing up with his father and coming to terms with his actions.

The brother of serial shooter Dale Hausner, who terrorized the city of Phoenix, Arizona in a year and a half-long killing spree, shares his own personal story.

The ex-sister-in-law and niece of Richard Ramirez, who killed 13 people in his home invasion spree, talks to a man who still hasn't recovered from an attack.

Daughters of American serial killer Robert Lee Yates, tell the inside story as to what life was like being raised by a notorious murderer.

Mildred Muhammad, the ex-wife of John Allen Muhammad, infamously known as the "DC Sniper," reveals how the man she loved disintegrated into a monster.

The daughter of the Craigslist killer talks with the son of a man who was murdered by her father and opens up about why she feels guilty of her dad's crimes.

Omar Mateen's first wife talks with family members of victims killed in the Pulse Night Club shooting and discusses internal battles her former husband faced.

Karen Kuzma, the sister of John Wayne Gacy, speaks out for the first time and reveals intimate details of one of the world's most infamous serial killers.

A woman recounts how she managed to become the sole survivor of Angel Reséndiz, a serial killer who became known at The Railway Killer.

In 1975, William Bonin abducts 14-year-old David McVicker in California and then embarks on a killing spree; David recounts details about the Freeway Killer.

Jose Ramirez Gonzalez discusses how he and three of his co-workers were attacked at a local fast food restaurant in 1997 by 39-year-old Paul Dennis Reid Jr.

Chief of Detectives Robert Anzilotti suspects Richard Cottingham might be responsible for the unsolved murders of schoolgirls in the 1960s and 1970s.

Chief of Detectives Robert Anzilotti continues to do everything in his power to connect Richard Cottingham to the murders of several schoolgirls.

Chief of Detectives Robert Anzilotti suspects Richard Cottingham might be responsible for the unsolved murders of schoolgirls in the 1960s and 1970s.

Chief of Detectives Robert Anzilotti continues to do everything in his power to connect Richard Cottingham to the murders of several schoolgirls.

A woman recounts how she managed to become the sole survivor of Angel Reséndiz, a serial killer who became known at The Railway Killer.

In 1975, William Bonin abducts 14-year-old David McVicker in California and then embarks on a killing spree; David recounts details about the Freeway Killer.

Jose Ramirez Gonzalez discusses how he and three of his co-workers were attacked at a local fast food restaurant in 1997 by 39-year-old Paul Dennis Reid Jr.