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Lonnie Franklin Jr., Convicted ‘Grim Sleeper’ Serial Killer, Dies In Prison

Lonnie Franklin Jr., a convicted serial killer known as the "Grim Sleeper," listens to emotional statements from family members of his victims before being sentenced in Los Angeles Superior Court, Wednesday, Aug. 10, 2016. Al Seib/Los Angeles Times via AP
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Lonnie Franklin Jr., the convicted serial murderer known as the “Grim Sleeper,” died in prison Saturday.

The 67-year-old was found unresponsive in his single cell on death row at San Quentin State Prison.

“Medical assistance was rendered and an ambulance was summoned. Franklin was pronounced deceased at 7:43 p.m.,” state prison officials said in a statement.

An autopsy is pending to determine the cause, but officials said there were no signs of trauma.

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In 2016, Franklin was found guilty of killing nine women and one teenage girl in South Los Angeles between 1985 and 2007. Authorities believe he murdered at least five other women.

He was sentenced to death and arrived on death row in August 2016.