He died in 1930 , and was survived by his Michigan - born wife , Gertrude , and their two sons .
Several years before his death , Penwarden applied to become a United States citizen , becoming a naturalized U.S. citizen in 1927 .
Penwarden died in 1930 , and was survived by Penwarden 's Michigan - born wife , Gertrude , and their two sons .
Several years before his death , Penwarden applied to become a United States citizen , becoming a naturalized U.S. citizen in 1927 .