A tripped but silent security alarm sent Shaun Pattison back to work on Wednesday night, where he found a chain saw-wielding burglar attempting to cut his way through the floor of Pattison’s family’s roller rink in north Spokane. With his family dog, Duke, by his side and a gun in his hand, Pattison shined a flashlight on the burglar. The dog’s ferocious barking brought the burglar out from the crawl space under the skate rink, at 11309 N. Mayfair St. But then a light shined on the rink’s owner from behind.