(CBS) – Nearly two years after the shooting death of a Chicago Police Officer another suspect is now charged in that crime.

Officer Clifton Lewis was an 8-year veteran of the Chicago Police Department at the time of his murder.

READ MORE: Remembering Hazel Johnson, Chicago’s ‘Mother Of Environmental Justice,’ On Earth Day 10 Years After Her Passing

Police say the arrest of 25 year-old Alexander Villa was a long time coming.

CBS 2’s Courtney Gousman reports Villa’s now charged with first-degree murder, aggravated battery, and armed robbery for his alleged role in officer Lewis’ death on December 29, 2011. He was denied bond in a court appearance Saturday.

Officer Clifton Lewis was off-duty, working security for a North Austin convenience store. Lewis was shot four times during a botched robbery and he died at the scene.

In January of 2012, prosecutors say Edgardo Colon and Tyrone Clay confessed to their roles in the crimes. Both are charged with murder.

READ MORE: Federal Rescue Plan Is Supposed To Keep Unemployment Benefits Going, But Many Say They're Being Held Up In Illinois

Investigators revealed Clay and another man fired the shots that killed officer Lewis, while Colon drove the getaway car.

Prosecutors say the men walked away with $670 from M And M Quick Foods convenience store and officer Lewis’ service weapon.

“It is a measure of comfort to bring to justice the dangerous and despicable individuals who committed this horrible act,” said Police Superintendent Garry McCarthy.

Last year prosecutors told CBS 2 a total of four men were involved in these crimes. Villa’s arrest makes three now behind bars.

MORE NEWS: Supt. Brown On Making Improvements Within CPD After His First Year On The Job: 'We Have To Gain The Community's Trust'

A reward was also being offered in this case.