Lynette Alice "Squeaky" Fromme aka Red. Member of the Manson Family. Fromme was paroled for attempting to shoot President Gerald Ford in 1975.
 
US DOJ Envelope postmarked Fort Worth, Texas August 2002.  The front is stamped in red "L. FROMME:"
This was sent to Michael Channels aka the Backporch Tapes while Fromme was incarcerated in Ft. Worth, Texas. 
Obtained from the Backporch Tapes collection.