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Man's conviction for 2011 shooting death of off-duty Chicago police officer overturned

He was convicted of killing a Chicago police officer in 2011, but he'll now walk free
He was convicted of killing a Chicago police officer in 2011, but he'll now walk free 02:20

CHICAGO (CBS) – A man convicted of killing a Chicago police officer in 2011 will soon walk free after his conviction was overturned on Wednesday because of misconduct by prosecutors at the Cook County State's Attorney's Office.

The family of Alexander Villa cheered when they heard the conviction was overturned. That caused police officers in attendance at the hearing to immediately leave and led to an outburst from both sides.

Villa was one of three defendants charged in the murder of Clifton Lewis, but the only one who was incarcerated. While charges against the two other defendants were dropped last year, Villa was given a life sentence for fatally shooting the officer.

Cook County prosecutors on Wednesday announced the conviction was overturned after it was revealed prosecutors withheld evidence in the trial.

"It's a bittersweet moment because we waited 11 agonizing, long years to prove Alex's innocence and it happened today," said Melissa Villa, Villa's sister.

A large group of Villa's family and friends attended Wednesday's hearing at the Leighton Criminal Courthouse. Family members were wearing t-shirts with Villa's prison mugshot under the words "wrongfully convicted." 

A group of police officers with the Fraternal Order of Police were also in attendance.

"Almost 13 years ago, Officer Clifton Lewis was robbed and killed by Alexander Villa and his gang bangers," said James McKay, an attorney for the FOP. "Today, Officer Lewis' family was robbed of justice."

Lewis, 41, was off-duty working a second job as a security guard at a West Side convenience store when he was shot and killed. He was trying to break up a robbery.

Before the decision on Wednesday, Lewis' mother and sister spoke with Cook County State's Attorney Kim Foxx. Tim Grace, another attorney for the FOP said, as he understood it, Foxx said her office was unable to "ethically prosecute" the case based on what her office did.

Villa's lawyers pointed to cellphone maps that showed he wasn't at the crime scene. Jennifer Blagg, Villa's attorney, showed where the crime happened compared to where Villa was.

Villa's attorney said they expect he'll be released from prison on Thursday from the Lawrence Correctional Center in southern Illinois.

The FOP said they'll push to re-indict Villa.

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