“20/20” explores the multi-decade investigation and conviction of William Lewis Reece, who was linked to multiple murders

A Virginia man has been arrested in connection with the cold case murder of a 32-year-old woman in 1986.

Florida authorities said they believe they've recovered the remains of a 16-year-old girl who mysteriously vanished nearly 20 years ago.

A woman has been arrested in the 18-year-old cold case of a newborn baby that was found dead at Phoenix Sky Harbor International Airport.

A new age progression photo has been released of Massachusetts college student Maura Murray to try to prompt new leads on the 20th anniversary of her disappearance.

On an audio recording of a phone call, suspect Duane Davis and his son can be heard discussing what prosecutors allege was a plot to harm their cooperating witnesses.

A father and stepmother have been arrested for the murder of their 5-year-old son who was found dead more than 30 years ago in South Carolina.

Victor Lee Turner and Megan Turner have been charged in the death of their 5-year-old son, Justin Turner.

More than three decades after she was murdered, police and prosecutors in Riverside, California, are hoping the public can help them identify the unknown victim.

State police announced that after more than two decades of investigating they have positively identified the body that was found in Lake Barkley.

The suspected victim of a convicted serial killer on death row has been identified nearly 50 years after his body was found near a California trail, authorities said.

Cathy Sposito, a 23-year-old college student, was brutally murdered while hiking on a trail in central Arizona and authorities have now identified her suspected killer.

Jacob Wetterling was kidnapped at gunpoint a half-mile from his St. Joseph home just after 9 p.m. on Oct. 22, 1989, and was never seen alive again.

A man has been arrested for the murder of a woman who was beaten to death in 1983 in Northern California.

After more than a century of being kept at a Reading, Pennsylvania, funeral home, a corpse that was mummified has been identified, according to the funeral home.

The man, who died of kidney failure in a Reading, Pennsylvania, jail, was accidentally mummified by a mortician in 1895.

The boyfriend of Crystal Rogers, a Kentucky mother of five who vanished in 2015, was arrested in connection with her disappearance, state and federal authorities said.

A Kansas man has been charged in the cold case murders of two women from the 1990s, authorities said.

Gary Davis has been charged in the deaths of two women dating back to 1996 and 1998.

A new “ABC 20/20" builds on original ABC News reporting from when Alissa Turney disappeared in 2001.

Alissa Turney was believed to be another teen runaway. A killer's false confession led authorities to take a closer look.

Stephan Smerk was arrested in the 1994 stabbing death of Robin Lawrence in Springfield, Virginia.

On June 13, 1987, Cathy Sposito, a 23-year-old college student, was brutally murdered while hiking on a trail in central Arizona.

Jennifer Odom, 12, disappeared after getting off a school bus on Feb. 19, 1993.

An 83-year-old former reverend has been arrested for allegedly killing an 8-year-old girl in 1975 while she was on her way to his Bible camp in Pennsylvania.

A four-decade-old cold case murder has been solved with the help of genetic genealogy technology, New Hampshire officials announced on Thursday.

A four-decade-old cold case murder has been solved with the help of genetic genealogy technology, New Hampshire officials announced on Thursday.

Holloway family spokesperson George Seymore discusses a new development in the case of Natalee Holloway, a teen who went missing in 2005.

Donald Santini was arrested in California for the murder of Cynthia Wood nearly 40 years ago.

Joran van der Sloot, the prime suspect in the unsolved 2005 disappearance of American teenager Natalee Holloway, lost an appeal and will be extradited.

A man who turned himself into police for the murder of his roommate is now suspected of being a serial killer, police said.

Police in Florida say they’ve uncovered the identity of a woman murdered 53 years ago, as well as the shooter in another cold case. ABC News’ Lionel Moise reports.

The woman has been identified as Sylvia June Atherton, 41, of Tucson, Arizona.

Dutch citizen Joran van der Sloot is facing extradition from Peru to the United States over his alleged extortion of Natalee Holloway's family after her disappearance.

Sheila Keen Warren, 59, pleaded guilty to second-degree murder in a Palm Beach County court on Tuesday as part of a plea deal reached weeks before her trial was set to begin.

Sheila Keen Warren pleaded guilty to second-degree murder for the fatal shooting of Marlene Warren in 1990.

A New York man has been arrested for the March 14, 2003, killing of his ex-girlfriend, 20-year-old Megan McDonald, according to authorities.

Crosley Green, 65, surrendered himself back to corrections officers on April 17.

A Minnesota man was sentenced for killing his wife in 2010 over the couple's debt, which he kept from her.

"20/20" explores the 13-year investigation into Heidi Firkus' murder, including an exclusive interview with the suspect's ex-wife who helped investigators.

John Allen Carter, 35, was booked in the Butler County Jail in Hamilton, Ohio, Wednesday for the murder of his then-fiancé Katelyn Markham.

More than a decade after Katelyn Markham disappeared, her then-fiance John Carter has been arrested in connection with her death.

Family is pushing for answers in the unsolved disappearance of postal worker Kierra Coles, who has been missing since 2018.

A young woman whose remains were found in the woods in Granby, Massachusetts, in 1978 and known for decades only as "Granby Girl" has finally been identified.

Suzanne Lyall, 19, vanished on March 2, 1998, after exiting a bus near her college campus in Albany, New York.

Twelve years after a shooting death on Cape Cod, the alleged killer was caught thanks to a root vegetable used in the commission of the crime, according to prosecutors.

Devarus Hampton, 40, was arrested Friday in Massachusetts and was arraigned Monday -- exactly 12 years after the crime.

Amanda Gonzales was excited to be a mother and had a reputation of defending others.

Authorities said they've found the killer of a four-months pregnant private found dead in her barracks over 20 years ago.

Police in Vermont say DNA evidence from a discarded cigarette helped solve a 1971 murder. ABC News’ Lionel Moise has the details.