Michael O’Laughlen grew up across the street from John Wilkes Booth.

O’Laughlen was sentenced to prison at Fort Jefferson in the Dry Tortugas for his part in his childhood chum’s plot against President Lincoln. He contracted yellow fever at the fort on August 19, 1867. Despite co-conspirator Dr. Samuel Mudd’s best efforts to save his life, O’Laughlen died on this day in 1867.

He was buried in the low-lying land surrounding Fort Jefferson, but his body was eventually turned over to his mother, who had it transported to bucolic Green Mount Cemetery in Baltimore, Md.

Booth, his old neighbor, was buried in the same cemetery after the government released his body to his mother.