In the mid to late 1970's they had a murder trial in Southern Maryland in which a fellow used an original front stuffer dueling pistol to "off" his wife's boyfriend. In addition, a repro kentucky pistol was used unloaded to attempt a bank robbery in PG county Maryland around 1980.
The guy that killed the Amish girls at the school two months ago had 5 lbs of black powder substitute bullets and reloading tools to reload his 9mm shells along with bullets. Some folks think the miscreant mistook triple seven for Reloader 7.
BTW in some states a cap and ball revolver is not legally a muzzleloader because obviously, they don't load from the muzzle.