The snakeskin was found Saturday in Riverbank Park along the Presumpscot River.
In late June, police saw a 10-foot-long snake eat a mammal, likely a beaver, and then swim across the Presumpscot River and disappear into brush. Residents were alarmed because children swim and feed ducks in that area.
The snake was quickly dubbed Wessie and the Presumpscot Python by residents on social media. Authorities speculated it was a pet that had escaped or was released.
The snakeskin will be tested to determine what type of snake shed it and if the snake is a threat to the public.