Andrew David Willson, a teenager from Michigan, United States (U.S.) has killed his mother for not letting him have a puppy.
Willson, 19, shot his mum last week on the back head while she was asleep.
Police say he was arrested Friday and denied bond was charged with murder and firearm possession.
Willson called police just before 7 a.m. Friday saying he found his mother, Lisa Marie Willson, dead in their Williamston home.
According to Fox News, officers found the 51-year-old woman with a gunshot wound to the back of her head.
Investigators discovered Willson and his mother were the only people in the home Thursday night, when they reportedly argued about keeping a dog the teenager had brought home with him a few weeks prior.
Lisa allegedly refused and told Andrew the pet would instead be kept with his father in Dansville, about 11 miles away, Detective Charles Buckland said.
Willson told detectives he took a .22 Magnum rifle from a locked cabinet and shot his mother in the back of the head, before tossing the rifle nearby, Buckland said.