Lonnie David Franklin Jr. aka the "Grim Sleeper" serial killer was responsible for at least 10 murders in Los Angeles, California. He was sentenced to death on August 10, 2016. Franklin died while on death row March 28, 2020.

Postcard from county jail mailed before he was sentenced to death. Hand signed at the close, Happy Valentine's Day, Love, Lonnie. 
Hand signed again on the front with his complete return address, Lonnie Franklin.