CHICAGO (STMW) — A Cook County Jail inmate faces new charges in connection with a 2012 murder and a separate 2011 shooting in south suburban Robbins, the Cook County Sheriff’s office announced Saturday.

Antwaan Bryant, 33, was booked into the jail in December 2012 on unrelated charges of attempted murder, unlawful use of a weapon by a felon and violating bond, according to the sheriff’s office.

An investigation by sheriff’s police and Robbins police has since uncovered that Bryant was allegedly one of two gunmen who shot and killed a man in the 13400 block of Clifton Park Avenue on June 29, 2012, a sheriff’s office release said.

Bryant allegedly pointed a gun into the passenger side window of a car about 4:15 a.m. and demanded money, the release said. He and an unknown second suspect fatally shot the car’s occupant after the victim tried to grab the gun and fight back.

Antwon D. Childs, 21, of Harvey, was pronounced dead at Ingalls Memorial Hospital roughly half an hour later, according to the Cook County Medical Examiner’s office.

Bryant is also newly charged in connection with a separate July 30, 2011, shooting at a gas station in the 13500 block of South Kedzie Avenue, also in Robbins, the release said.

In that incident, Bryant allegedly approached a person with a gun about 3:10 a.m., and shot the victim in the back when he tried to run away, the release said. The victim had tried but failed to wrestle the gun away before he ran.

Bryant, of Robbins, was ordered held on $2 million bond for the murder charge, and $500,000 for the aggravated battery with a firearm charge, the release said.

He will next appear in court May 21 at the Markham courthouse.

(Source: Sun-Times Media Wire © Chicago Sun-Times 2013. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)

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