A 76-year-old retired Prince George’s judge was found dead of a single gunshot to the head Monday night at his Bowie home after holding police at bay for almost 12 hours, according to Prince George’s County police.

Cpl. Stephen Pacheco said George Rice Hovey Johnson began firing rounds from a handgun around 11 a.m. and his wife, Joan Johnson, fled the house in the 16000 block of Audubon Lane. Joan Johnson told officers her husband suffered from Alzheimer’s and was suicidal, Pacheco said.