I wish I could be more helpful in identifying the artist, but at least I might be able to provide a lead: around this time, there was a guy whose characters had the sweat-radiating, shiny-and-wide-eyed po-faced look of the short cop here--except CONSTANTLY--and his work also featured the unique lettering we see here in the bolded wording (the monster's growls in two of the last three pages).Can't remember the artist's name, but I do recall that he had a feature starring a boy pirate as one of the backups in the early run of a Golden Age title. I'm gonna start rifling through my library until I find the man's name, because now it's makin' me cray-cray.
This is Milt Stein. If you have any other stories featuring him please share! Thanks!