The ` ` Grim Sleeper '' killings claimed at least 10 lives from 1985 until 1989 . When detectives announced the arrest , they also revealed that Franklin had , for a time , worked as a garage attendant at a Los Angeles police station and previously had an arrest record although his offenses did not require him to submit a DNA sample . Lonnie Lee Franklin Jr. was arrested in the 1980s . A grand jury returned an 11-count indictment against him . He was found guilty on two counts of murder and one of attempted murder .
The ` ` Grim Sleeper '' killings claimed at least 10 lives from 1985 until 1989 . Lonnie Lee Franklin Jr. was arrested in the 1980s . A grand jury returned an 11-count indictment against him . He was found guilty on two counts of murder and one of attempted murder .