Read more: Richard Ramirez Dead -- Night Stalker Serial Killer Dies On Death Row | TMZ.comRichard Ramirez
Night Stalker DEAD
Richard Ramirez -- aka The Night Stalker -- who went on a rape-murder spree in Los Angeles in the mid-80s and terrorized the entire city -- is dead at 53 ... but we're getting conflicting info on the cause.
Ramirez killed at least 13 people and attempted 5 more ... by climbing in the windows of homes. He also committed 11 sexual assaults, and probably more.
Ramirez was convicted and sentenced to death in 1989, and sat on San Quentin's death row ever since. The death sentence was not carried out because of endless appeals.
A San Quentin spokesperson reportedly says Ramirez died of natural causes ... HOWEVER ... a prison official told TMZ ... the murderer died from Hepatitis C, which some doctors say can be transmitted through sexual contact. Hep C is verifiably contracted through IV drug use and blood transfusions.