Detectives recently obtained a warrant to test the DNA of Richard Ramirez, the so-called Night Stalker, based on new information in the 1984 death of 9-year-old Mei Leung, who was sexually assaulted and killed in the basement of her home, CNN reported Friday.
"There are no charges at this time," said David Shinn, deputy director of the department's Bureau of Investigation.
Police investigators traveled to San Quentin Prison, where Ramirez is housed while awaiting execution, to get a sample of his DNA.
Ramirez was convicted in 1985 of 13 murders, 11 in Southern California and two in the San Francisco area. He also was convicted of five attempted murders, 11 sexual assaults and 14 burglaries. Ramirez was nicknamed "Night Stalker" for his preference of committing his crimes in the early-morning hours.
Leung's death was an open case for 25 years until what police received what they said was new information pointing to Ramirez as a possible suspect.