A man found his twin brother fatally shot by a crossbow outside a Michigan home on Wednesday.

Nyoky Bull, 20, of Grant, Mich., was arrested on Thursday in connection with the shooting of Marcus Olmstead, also 20. He is slated to be arraigned on Friday afternoon and expected to be charged with open murder in the death of Olmstead, WOOD-TV reported. Bull admitted to arranging a meeting with Olmstead before the crossbow incident, according to police warrant.

The shooting was not a random act and the Bull apparently knew Olmstead, authorities said.

Bull had allegedly "discharged a crossbow at the victim, striking him in the torso and killing him in his driveway," a news release from the Norton Shores Police Department stated.

Police said the death was ruled a homicide following an autopsy, FOX17 reported.

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Olmstead’s twin brother, Maxwell, discovered him in the driveway of his home, with a crossbow bolt lodged in his torso. His stepmother, Michelle Olmstead, told WOOD-TV she tried to revive him.

"The first thing I do, I see him, I went into nurse mode, checked a pulse, did CPR," she said. "He was already passed. He was cold."

Michelle Olmstead said her stepson had returned from a friend’s house playing games hours before his death and had been waiting for a girl he had messaged. She said his twin is devastated.

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"Max had the strongest bond to Marcus than anybody," she said. "He's devastated. He's very angry. He's a 20-year-old young man. He's got a flow of emotions. He lost half of himself — his twin."

The Associated Press contributed to this report.