Lawrence Bittaker serial killer dubbed the "Toolbox Killer.” Bittaker was sentenced to death in March 1981 while his accomplice Roy Norris received 45 years to life.

6 1/4" x 11" gap leg girl pop up card card handmade on death row.  Larry no longer makes this card due to the prison deeming it to be offensive.
Perhaps the most genius items I've seen to come from anyone on death row are Bittaker's pop up cards! 
The front reads, "There was a girl, hardly shy; Instead of :Hello," She'd say .... "
The card opens up to a girl on a bed spreading her logs. Signed and dated on the back "LS Bittaker S.Q.D.R. 1994"

Lawrence Bittaker Pop Up Gap Leg Girl Card Signed