Nathan Leopold handwritten envelope with 6 lines penned in his hand from 1966
This envelope is postmarkes from August 8 1966 and is signed N.F Leopold with his address in Puerto Rico.
He would pass away in 1971 less then 5 years after sending this envelope in Puerto Rico.
Many movies like murder by numbers with Sandra Bullock and Ryan Goslin was based on the Leopold and Loeb case.
Executed on October 2007 by the State of Alabama