Man was killed. Held Jack of spades, the card.
The figure in it spun to life! Why, is not known, but it can be speculated.
He immediately swore to rid world of crime!
Where-ever Jacks help is needed, he comes to life, from his playing card form. He is in almost every deck (except presumably for the ones from what the Jack of spades has been destroyed), so anywhere he is needed, he appears.