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GARY—Police knocked on doors Monday morning at Woodlake Village, hoping to find witnesses who saw a car, a suspect, an accomplice – anything – that would lead them to Juble Hairston’s killer.

Hairston, 36, well known to many Gary police officers and federal agents as well, was shot and killed at his girlfriend’s apartment before dawn on Saturday.

His girlfriend told police she and Hairston were out until about 2 a.m., then returned to her apartment. About 5 a.m., a man kicked in the door and immediately began to hit Hairston in head with a gun, the police report states. She ran out of the apartment and went to her mother’s home, which is nearby, to call for help, Sgt. Dan Callahan said.

When she returned, Hairston was dead. He died at the scene from gunshot wounds, the Lake County coroner’s news release states.

Callahan said police have a general description of the assailant, but no information about any vehicle or possible accomplice that might have been involved.

Hairston was a member of the “Bronx Boys” street gang that waged a lengthy, deadly war with another gang, CCA, located in Concord Commons apartments in the late 1990s. The FBI-led Gang Response Investigative Unit broke up the two gangs and sent multiple members to federal prison.

In 2004, Hairston was charged with dealing cocaine.

In 2011, Hairston was charged with more than three dozen crimes related to dog fighting. Two years later he pleaded guilty and agreed to terms that included 18 months of probation. More recently, he was facing a violation of that probation and was scheduled to appear in Lake Superior Court in May, court records show.