According to official documents, the victim went to a mobile home in the area of Litchfield Road and Main Street around 1 a.m. Sunday to contact his ex-girlfriend.
The woman and Valentin Chaparro Arroyo were in the bedroom and heard the victim attempting to get inside the home. They warned him several times to leave or else police would be called.
The victim, who was believed to be armed, eventually broke through the rear door, saying he was "going to kill (Arroyo)", according to the documents. During a fight inside the home, Arroyo told police that he attempted to fire a shot in the air, but realized he shot the victim in the head.
Arroyo went outside and waited for police where he admitted to the shooting. Arroyo and the woman both told police the victim had been making threats for several weeks via social media, phone calls and text message. He reportedly said, "if he could not have her, no one could."
Police say Arroyo was found to be an undocumented immigrant under another name who matched a misdemeanor warrant. His legal status is a factor considering him to be a flight risk if released from jail.
He was booked into jail on charges of manslaughter and misconduct with weapons by a prohibited possessor.