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Vivian Williams had long given up hope that her sister’s slaying would be solved when she flipped on her television and saw news about a serial killer nicknamed the Grim Sleeper.

As she watched Los Angeles police detectives raid a green house on 81st Street, a sickening feeling overcame her. Williams realized she had been to the home many times, dropping off her sister, Georgia Mae Thomas, to visit a boyfriend, Lonnie.

“He did it, he did it!” she yelled to her husband. “I know he did it.”

That man, Lonnie David Franklin Jr., was convicted Thursday in the killings of nine women and a 15-year-old girl.

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