Fingerprints lifted from two beer bottles help a California detective track down a prostitute's killer; the investigations of a woman's murder and the death of a man killed in a car crash use DNA analysis.

A woman is found murdered in her mobile home; an Oregon man is shot dead.

A 25-year-old woman is killed in a hotel room in 1978; a 25-year-old woman is shot to death during a jewelry-store robbery in 1980.

Two young girls are raped, murdered and dumped in an abandoned house; a 26-year-old mother of three disappears on Christmas Eve in 1995.

A Detroit cab-company owner is murdered in 1989; in 1986 a woman is found murdered in her bedroom.

The 1988 rape and murder of a California woman; a jailhouse snitch.

A missing sailor's sister works to prove he was killed; rape and murder.

A banker is beaten to death in his bed; a man with a guilty conscience helps police.

Police go under cover to catch a man they suspect of killing three prostitutes; a letter opener links a priest to the murder of a nun.

In 1947, actress Elizabeth Short's corpse is found nude and bisected in an empty lot.

Detective Danny Reyes investigates the 1990 murder of a Fort Worth, Texas woman.

In 1995, two women are raped in Louisville, Ky.; in 1982, a young man is found murdered in Deadwood, S.D.

A brother is a suspect in the case of a 12-year-old found dead in her home in 1998; a 69-year-old woman is the victim of rape and murder in 1984.

Young girls are sexually assaulted while waiting for their school buses; in 1991, a 9-year-old girl disappears from her home and is found murdered.

A police detective suspects a killer preys on older women; a protective mother disappears after learning her daughter has been sexually molested.

A wiretapped conversation between a suspected killer and his sister cracks a 9-year-old murder case; a geologist finds human bones, solving the murder of a Virginia woman.

In 1987, a young girl is found raped and strangled; in 1983, a young mother is raped and murdered at work.

DNA evidence solves the murder of a female law student; a man confesses to the random killing of a bowhunter.

Detectives work to solve the 1995 rape and murder of a 14-year-old.

A cell phone and an ATM card lead to the apprehension of a rapist.

Publicity of a man's mandatory release in Texas brings forth a witness to a murder in Michigan.

A detective tracks down a man who raped and murdered a 6-year-old girl 10 years earlier; police search for the killer of an 18-year-old hitchhiker.

A deacon suspected of having an affair is found shot to death in Tijuana, Mexico; a woman claims she was assaulted by the man that killed her husband.

Nearly 20 years after they first suspect him, police arrest Gary Ridgway, the most prolific known serial killer in U.S. history.

BTK Dennis Rader terrorizes Wichita, Kan., for decades, leaving at least 10 murder victims in his wake.