Glen Treslar

Glen Treslar been charged with first -degree murder in the killing of his wife in their Monkton home. (Handout photo courtesy Baltimore County Police & Fire Depts. / April 8, 2014)

An 82-year-old Monkton man faces a first-degree murder charge in connection with his wife's death at their home on Monday.

After receiving a call from a concerned friend at around 3:07 p.m., Baltimore County police found Yvonne Treslar, 78, lying of the floor of a bedroom at the home in the 16500 block of Garfield Ave., suffering from multiple gunshot wounds, according to a news release. Her husband, Glen Henry Treslar, allegedly told police that he had shot his wife following an argument earlier in the day.

Baltimore County Fire Department medical personnel declared Yvonne Treslar dead at the scene.

Police said Treslar also shot and killed the family dog.

The suspect did not elaborate on the argument nor why he reportedly killed the dog, which police found in the kitchen, according to the release.