An Indiana father who called 911 and told them his daughter was lifeless “after falling down the stairs” is now charged with murder after cops discovered he allegedly abused and choked the 5-year-old during a fight with his ex-girlfriend, claiming, “She drove him to do this,” according to court documents.

Zachary Arnold, 41, is accused of killing his daughter Zara Arnold inside his east Indianapolis home on Monday morning. Authorities say they went to the residence at around 11 a.m. and pronounced Zara dead at the scene after being contacted by Arnold. Signs of trauma were allegedly observed on the girl’s body, according to the Indianapolis Metropolitan Police Department.

“I am heartbroken by the tragic loss of 5-year-old Zara,” wrote IMPD Chief Chris Bailey in an X post on Tuesday. “No child should suffer such harm, especially in a place that should be safe: their home.”

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Court documents obtained by local CW affiliate WISH and the NBC affiliate WTHR detail how Arnold was allegedly arguing with his ex-girlfriend, who spoke to police about everything, in the days leading up to Zara’s death. He allegedly lashed out at Zara over it, the documents say, and told his ex the girl wasn’t following his rules.

“He was going to kill her, but then stated ‘hurt’ her,” the ex told police about Arnold’s alleged actions and feelings toward his daughter.

When police spoke with Arnold, he allegedly admitted that Zara didn’t fall down the stairs, WTHR reported. He allegedly said that after choking her, Zara asked him why he hurt her and said she loved him. Arnold allegedly admitted it was wrong of him not to check on her before going to bed after the incident, adding that he didn’t because he was too angry at his ex.

“After he stopped choking her the last time that night, Zara told him she was tired and climbed into bed,” Arnold allegedly told investigators.

On Monday morning, Arnold sent text messages to the ex with photos of Zara “foaming at the mouth,” according to police, along with alleged statements about killing her. Zara’s grandmother spoke to investigators and said Arnold was known to do drugs around the child and withhold food from her. He would also allegedly abuse and smack her with open palms.