This is another two part episode about a sadistic serial killer who victimized several people in the 1980's.
References:
Documentary
Netflix: Night Stalker: The Hunt For a Serial Killer
Richard Ramirez: The Night Stalker | Crime + Investigation UK (crimeandinvestigation.co.uk)
Tragic story of how nine-year-old girl became Night Stalker’s youngest murder victim - Daily Star
DNA Links "Night Stalker" Richard Ramirez to 1984 Killing of 9-Year-Old Mei Leung - CBS News
Finding of 1st Stalker Case Victim Described by Son - Los Angeles Times (latimes.com)