Sylvester L. Miller, 26, of Waukegan.

Prosecutors say a Waukegan man used a short-barrel AR-15 pistol to confront the wife of a woman whom he was supposedly having an affair with in Waukegan.

Sylvester L. Miller, 26, of Waukegan, was charged with two counts of aggravated unlawful use of a weapon, aggravated assault with a deadly weapon and resisting a peace officer.

Lake County Assistant State’s Attorney Francis DeRosa said the victim in the case and a witness are two women who are married to each other.

The witness was reported to be having an affair with Miller, DeRosa said.

The married women were in an altercation over the issue early last week.

Miller, who lives in the same apartment complex as the women, came down to their apartment with a loaded short barrel AR-15 pistol.

The victim was “scared for her life” and believed Miller was going to kill her, DeRosa said.

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The victim called 911 and officers showed up, at which point Miller allegedly began running from them.

Officers caught up with Miller and arrested him. They found the firearm underneath his clothing.

Miller admitted to going to the apartment because he “just wanted to scare people,” DeRosa said.

Miller did not tell officers where he got the gun but claimed he lost his Firearm Owners Identification card.

Officers learned Miller’s FOID card had actually been revoked last year for narcotics usage and that Miller had no concealed carry license, DeRosa said.

Lake County Judge Theodore Potkonjak ordered Miller held on a $250,000 bond.

Miller remains held in the Lake County Jail and would need to post $25,000 cash in order to be released.