Career
Shockley, a black male, was executed in Maryland in a gas chamber for the murder of shopkeeper Sarah Hearne on January 16, 1958. Shockley (then 16) was involved in the robbery of a small shop in Dorchester County, Maryland. Hearne was found stabbed several times in the back and breast, and her throat had been cut.
The young culprits were identified by an eye witness.
Leonard was 17 years of age at the time of his execution making him the last instance of a juvenile being executed in the United States of America.