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.

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.

A Missouri man has been sentenced to 10 years in prison, nearly four decades after a woman was strangled with her body dumped in the woods

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.

Nevada State Police say recent DNA testing has enabled the identification of human remains found 45 years ago inside a garment bag in a small town two hours northeast of Reno

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

A newspaper is reporting that a 67-year-old man has pleaded guilty to killing a Missouri woman in 1987

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.

Police are continuing to search for clues in the case of the murdered parents of the child known as "Baby Holly."

"Baby June" was found dead, floating in the ocean off the coast of Florida, on June 1, 2018. Authorities said they have arrested the newborn's mother for her murder.

After 65 years, Philadelphia police have identified the body of Joseph Zarelli, who was 4 years old when he was beaten and stuffed into a cardboard box.

A little boy killed more than 60 years ago has finally been identified.

Joseph Augustus Zerilli was found dead in a box in 1957, police said.

The little boy's body was found in a box in February 1957.

A convicted murderer, known as the "Torso Killer," pleaded guilty to murdering a dance teacher in 1968 and admitted to killing four other women in the early 1970s.

DNA advances helped investigators solve the 42-year-old cold case of Eve Wilkowitz, who was killed in New York in 1980.

Plus, Democrats and Republicans make their final pitches to voters ahead of the 2022 midterm elections and the Supreme Court hears two cases that could upend affirmative action in higher education.

Moody confessed in May to killing the 17-year-old and led law enforcement to her remains. He had been a person of interest in the killing for over 10 years.

Investigators in Georgia have used genealogy technology to determine the killer of a Michigan woman who vanished more than 33 years ago.

John Carey, 63, is accused of strangling Claire Gravel, 20, to death in Beverly, Massachusetts.