Trial begins for Chicago police commander accused of assaulting suspect

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

CHICAGO -- The trial of a Chicago police commander accused of assaulting a suspect began Tuesday.

Glenn Evans is charged with aggravated battery and official misconduct. Evans is accused of shoving the barrel of his gun down the throat of Rickey Williams after chasing him into an abandoned building on the South Side in 2013.

Williams' DNA was found on the barrel of Evans' gun. The defense says the DNA could have come from Williams touching the gun during his arrest.

Evans is also accused of holding a taser to Williams' groin and threatening to kill him.

Williams said he ran from Evans because he was nervous.  Evans said he chased him because he saw a gun. He was found in the closet of an abandoned house. No gun was recovered.

Williams was the first witness for the prosecution. At times he appeared confused, answering the same question differently. on cross examination, Evans' defense attorney seemed to confuse Williams more. In court, she showed the type of gun allegedly shoved down Williams' throat.  and then showed a photo of Williams with no visible signs of injury.

Evans was placed on desk duty after he was charged.

Williams is a convicted small-time weed dealer.

The bench trial is expected to last about a week.