A northwest Indiana man was mauled to death by one of his pet pit bulls on Christmas Day, police said.

Authorities were called to a home in the 5500 block of Tulip Avenue about 8:14 p.m. after 40-year-old Edward L. Cahill was found on his living room floor by his girlfriend, according to a Portage police report. She had returned from visiting relatives for the holiday when she found him unresponsive.

When police arrived, they found Cahill dead on the floor covered in blood and with multiple lacerations on his face and arms, according to the report. Porter County Coroner Chuck Harris pronounced Cahill dead at the scene and ruled his death a dog mauling.

He was apparently mauled by “Fat Boy,” one of his pet pit bulls, according to the report. The dog was aggressively barking, growling and lunging at officers when they arrived at the house, and police had to use a stun gun and an animal control pole to get him under control and remove him from the home.

The couple has had their dogs since they were puppies, according to the report. The police report also noted that “Fat Boy” has always been aggressive and bit Cahill and his girlfriend’s son in the past.