01/07/2012 01:00 pm ET Updated Jan 09, 2012

Clifton Lewis Murder: Two Charged In Shooting That Killed Chicago Cop (VIDEO)

Two Chicago men were charged early Saturday morning in the Dec. 29 shooting death of veteran Chicago police officer Clifton Lewis.

Tyrone Clay, 29, and Edgardo Colon, 34, were charged with murder while in commission of an armed robbery and first-degree murder of a peace officer, the Chicago Tribune reports. They are due to appear in bond court at noon Saturday.

A third person being questioned in the shooting has been released without being charged.

Lewis, 41, was off-duty and working security at M&M Quick Foods on Chicago's West Side when he was shot while attempting to thwart a robbery. He had worked for eight years in the city's 15th District.

He reportedly took the side job to help pay for an upcoming wedding -- he had proposed to his longtime girlfriend on Christmas Day. His family is devastated.

Thousands of police officers from throughout the state joined Mayor Rahm Emanuel, Gov. Pat Quinn and Chicago Police Superintendent Garry McCarthy to pay their respects to the slain officer in a funeral service at the United Missionary Baptist Church on Thursday.

Officer Calvin Jones told Fox Chicago what he will remember about his former partner on the job:

"It's very sad. It's like I said before, it's like a family member has been taken from us. ... I love my job. I know now Clif is watching over my back and the 15th District and every officer. He's our angel now."

According to Fox, detectives investigating the slaying caught a break when Colon was stopped Tuesday for making an improper turn in his vehicle. Police proceeded to find a .357-caliber handgun with two live rounds in his car. Colon is a parole who, the Tribune reports, was convicted in 2007 for invading a home while armed with a firearm.

WATCH family, friends and colleagues of Lewis remember the slain officer during his Thursday funeral service:

Murdered Off-Duty Police Officer Laid to Rest: