What was the Ferocious Creature that Terrorized a town in 1939?

The media dubbed it the Glawackus - an elusive and ferocious creature first spotted in Glastonbury, CT that veteran hunters could not identify. It killed wildlife, dogs, chickens, and made unidentifiable howls at night, terrifying the population. Finally, one hunter is believed to have bagged it - but there is much more to the story.