Dangerous old man from the south

Read a bit about Jack Hinson.

Link 1
Link 2

Seems he was too old to fight when the Civil War started (nearly 60 at the time).
Hinson remained neutral - keeping friends among the local Confederates, as well as General Grant himself.
Until Union troops murdered his two sons. Then he snapped.

By the end of the war, he had killed over 100 Union Soldiers and Sailors with his special-made sniper rifle.
Once, a 500-man detachment was sent to get him - they and failed.
He reportedly made 500-yards shots (this claim is of a dubious nature - muzzle-loaders today cannot replicate the feat).
Hinson's family was decimated by the war - 7 of his 10 children died due to the hostilities or related events.
Hinson himself survived the war, and lived until 1874.