An Indiana father shot and killed his 9-year-old daughter while telling his children to not play with guns, police said.

“She’s dead. She’s f***ing dead,” he told officers who arrived at his Hobart home, according to an arrest affidavit filed in Lake County.

Read: Ex-Psychologist Gets 3 Years for Shooting Husband as He Slept Just Feet From Their Children

Olivia Hummel was unresponsive and lying in a bedroom entrance when police responded to a call of a person shot, police said.

“It’s hard to wrap your head around it,” Hobart Police Lt. James Gonzales told InsideEdition.com Tuesday.

The dad told officers he had been showing the weapon to his twin 10-year-old sons and told them to “never use a gun” when his daughter walked into the room.

He pulled the trigger, shooting the girl in the head, police said.

The boys told police their father had forgotten he’d put bullets in the gun, according to the affidavit. Earlier, he had emptied the weapon and pulled the trigger while pointing it at the boys, they told officers.

He then reloaded the gun, police said. When Olivia walked into the room, he said “See, don’t play with guns,” and shot her, according to the document.

“He shooted her,” one of the boys told officers on the scene.

Read: Teen Watched as Her Mother Was Fatally Shot by Estranged Husband Outside School: Friend

The father told police he had been showing the gun to his kids and didn’t think it was loaded.

“I shot her," Hummel told his wife on the phone before he was taken into custody, according to the affidavit. "I’m so sorry. It was so stupid."

Hummel was arrested and charged with reckless homicide, neglect of a child resulting in death, battery resulting in death and two counts of child neglect.

He has been released on $70,000 bail, police said.

Watch: Husband Accidentally Shoots Wife in Stomach After Hunting Flower-Eating Squirrel

Related Articles: