The skull belongs to Frank Castle, the Punisher, who first showed up in ‘The Amazing Spider-Man’ #129 back in 1974. He’s a former Marine turned vigilante after his family was killed by the mob.

It was a giant "Punisher" skull sticker on the rear window from the comic book vigilante. "And you've never heard of The Punisher?" WISN 12 News reporter Hillary Mintz asked.

In a powerful scene, Frank encounters police officers who express admiration for his methods, with one even showing off a Punisher skull sticker on his patrol car. Castle’s response is immediate ...