Darrail Mix’s brother could hear him yelling in the background as he talked to his father on the phone, he told police.

One of LaDarrell Mix’s sons, identified in court documents as “L.M.,” said his father called him Saturday afternoon and told L.M. he was arguing with Darrail Mix about money LaDarrell owed him, according to a probable cause affidavit.

After the call ended, L.M called his brother and asked him how much money their father owed him, he told police.

“Don’t worry about it," Mix reportedly told his brother. "We were fighting, he rushed me and I shot him. I love you and I’m going to prison,” he said, according to court documents.

Mix, 36, was arrested Sunday in connection with his father's death, Indianapolis Metropolitan Police said this week. He was charged Wednesday with murder.

Mix’s attorneys didn’t immediately respond Wednesday evening to a request for comment.

IMPD officers responded to a parking lot on the far east side around 1:20 p.m. Saturday on a report of two men arguing. They found LaDarrell Mix with a gunshot wound to the torso, Det. Jose Torres wrote in the affidavit.

The 56-year-old was taken to Eskenazi Hospital where he died about a half hour later, police said. He suffered a single gunshot wound to his left side, an autopsy found.

Responding officers were told that the argument started at a residence in the 10000 block of Penrith Drive. An officer spoke with L.M., who told him that his brother, Darrail Mix, had shot their father, the affidavit said.

Officers at the home saw blood by the front door, blood on the stairs going up to the residence and a large amount of blood in the living room near the couch, court documents said. A fired cartridge casing was on top of the couch, according to the affidavit.

A witness told police he was walking near the residence when he heard two people arguing inside. The person said he then heard two gunshots coming from the home, so he ran back to his. After he returned home, he saw a black man run towards the parking lot, then collapse in front of his vehicle, the witness said, according to the affidavit.

On Sunday evening, Officer Torres was informed that Mix was turning himself in at a northwest side church, he wrote in the affidavit.

Records show Mix was ordered held without bond at his court appearance Wednesday. He’s due back in court in November.

Call IndyStar reporter Crystal Hill at 317-444-6094. Follow her on Twitter: @crysnhill.