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.