This Santa was a grinch.

RCMP say a man dressed in a full Kris Kringle costume walked into Ware's Jewelry store in downtown Stettler, Alta., pulled out a gun, demanded the clerk hand over precious metals and stones, and then fled in a Hummer.

On Christmas Eve, no less.

Now, police have put out a plea for help from the public in locating the suspect.

He is described as a white male, about six feet tall, with blonde hair and acne scarring on his face.

He made off in a black 2005 Hummer H2.

On Dec. 28, RCMP found a Hummer believed to be the getaway vehicle in a residential Stettler neighbourhood.

Video surveillance captured the vehicle pulling into the area and being left behind. Police believe the suspect then got into a second vehicle, an older model pickup truck described as a possible Chevrolet with an extended cab and chrome running boards.

Santa getaway truck Stettler

Police believe the suspect - who was, again, dressed as Santa Claus - made off in this older-model pickup truck after ditching his initial getaway vehicle, a Hummer H2. (RCMP)

Stettler RCMP is asking anyone with information related to the incident to contact them directly or to call Crime Stoppers anonymously at 1-800-222-8477.

No word yet on whether Billy Bob Thornton served as inspiration to this bad Santa.

Bad Santa

Billy Bob Thornton is not believed to have been involved in the Stettler robbery. (Miramax)