As a 1900's era Cop, he knows how to ferret out the scumbags.

As a 1900's era Villager, he knows how to hang the scumbags high.

As a 1900's era Mafia Goomba, he knows how to kill honest people in their sleep and laugh in their friend's faces the day after.

As a 1900's era Doctor, you'd be better off just doing the surgery on yourself. ;)