Whatever became of the evil Mr Sinn after Jet Powers whipped his butt?
Yeah, Sinn died.
Nothing to worry about.
Won't be seeing him again!
You don't really believe that, do you?
Good, 'cause if you did, you wouldn't be able to read the rest of this series, featuring superb Bob Powell art like this, the second Jet tale from Magazine Enterprises' Jet Power #1 (1950).