Marty and Candy Larsen were in their pajamas, getting ready to watch a movie in the living room, when they heard their 27-year-old daughter scream.

“I need help!” Julia cried.

They could see her standing just a few feet away, her long blond hair unkempt, her blue-gray eyes at once alert and vacant. She’d looked like this in other moments when fear overtook her and reality slipped away. But a new sight jolted them upright: their daughter’s fingers, wrapped around a pink handgun.

Julia pounded the weapon against a wall, then squeezed its trigger, sending a bullet down an empty hallway. “Help me!” she shrieked.