Charles "Tex" Watson a member of the  so-called Charles Manson Family who was convicted of murdering Sharon Tate, Jay Sebring, Voytek Frykowski, Abigail Folger, Steven Parent in Beverly Hills and the following night murdered Leno and Rosemary LaBianca in their Los Feliz, California home. 

Prison mailed postcard with an interesting handwritten message to someone that lived in the same area where Watson grew up.
Hand signed, Charles xx.
The backside is completely written by Tex and hand signed, C. Watson.