Officials said 23-year-old Mario Jose Estrada, accompanied by several family members, surrendered himself at the Lancaster sheriff's station early morning, following a day-long manhunt by homicide investigators.
His roommate's body was found Thursday morning in a field close to where the men lived in the 44700 block of Division Street. A nearby resident saw the body and said the victim was shot in the head.
According to Estrada's family, he admitted to shooting his roommate and they tried to convince him to turn himself in on Thursday, but he was nowhere to be found.
"The suspect called his older brother claiming that he had shot his roommate," Sgt. Robert Martindale with the Los Angeles County Sheriff's Department said.
Family members rushed to the scene of the murder and discovered the gruesome crime before contacting the LASD.
Deputies didn't disclose a motive behind the murder.
Estrada was taken into custody and booked for murder. He was being held in lieu of $2 million bail.