Some of the murderers here are believed to have killed even more people than they were convicted of killing, and the true toll may never be known.

Robert Lee Yates pleaded guilty to murdering 13 women in Spokane, Washington, killing them and dumping their bodies in rural areas.

Yates's death sentence was commuted to life in prison after the state abolished the death penalty. .

Chester Turner was convicted of killing 14 people in Los Angeles in the 1980s and 1990s.

Ángel Maturino Reséndiz, known as "The Railroad Killer," killed at least 15 people across the U.S.

He would jump off trains and kill people in nearby homes, attacking with a knife, a pick axe, rocks and other blunt objects.

Randy Steven Kraft, known as the "Scorecard Killer," drugged, raped, tortured and murdered at least 16 young men between 1972 and 1983.

Charles Ray Hatcher raped and murdered at least 16 people — mostly young men and boys — in Missouri, California and Illinois between 1969 and 1982. .

Simon, were convicted of killing 15 people; they had dubbed themselves the "Death Angels," and authorities would call them members of a cult.

He confessed to the killings, saying there could have been more because he was usually drunk when they occurred. .

He is serving life in prison at the Oregon State Penitentiary in Salem.

Larry Eyler was convicted of murdering a 15-year-old boy and confessed to killing at least 21 more young men and boys between 1982 and 1984 across five states.

William Bonin, another murderer known as the "Freeway Killer," killed at least 21 boys and young men in 1979 and 1980.

Before Watts's death in prison in 2007, authorities suspected him of up to 100 murders in total.

In the case known as the Atlanta Child Murders, at least 28 African American children and young adults were killed in the Atlanta area.

Earle Nelson, known as "the Gorilla Man," was convicted of murdering 22 people in the U.S

He is serving life in prison. 

Officially, Gerald Stano confessed to killing 41 women, mostly in Florida and New Jersey — starting, he would eventually say, in the early 1970s, though his killing spree may have begun even earlier

She is thought to have killed 14 people, most of whom were men lured to her Indiana home with the promise of marriage

Juan Corona was was a Mexican national convicted of the murders of 25 people, all of whom were found buried in peach orchards along the Feather River in Sutter County, California, in 1971

The murders, known as the Houston Mass Murders, were discovered after one of Corll's accomplices fatally shot him

Ted Bundy was executed in Florida in 1989 and was linked to a string of murders of young women in several states during the 1970s

He confessed to 35 murders before his execution

He would often win over women with his good looks before attacking them

Gary Ridgway was sentenced to life in prison in 2003 after he admitted to killing 49 women in the 1980s and 1990s

Samuel Little was convicted in 2014 of killing three women in California in the 1980s

Four years later, the 78-year-old confessed to killing about 90 women across the country over several decades