A Milwaukee police officer has been fired for using excessive force on a woman arrested during a traffic stop, the department announced on a website Monday evening.

Richard Schoen, 42, punched the woman in her face while she was handcuffed in his squad car before pulling her out by the hair and striking her with his knee, according to a posting on a department website, The Source.

Police Chief Edward Flynn fired Schoen on May 1, according to the website. Schoen had been with the department nine years.

Schoen pulled the woman over about 9 p.m. on Sept. 22 in the 4100 block of N. 51st Blvd. The reason she was pulled over was not disclosed. The woman was arrested after becoming argumentative and using profanity and was taken to the District 7 police station, the website states.

After arriving at the station's garage the woman began to stomp on the floor of the squad, complaining that her left leg hurt. Schoen opened the rear passenger door and tried to pull her out by the bottom of her shirt.

He then entered the rear passenger compartment and struck the woman in the face before pulling her out of the car by her hair. When the woman was on the floor of the garage, Schoen struck her in the abdomen with his knee, according to the website posting.

The posting also did not identify the woman nor state whether she was charged with any offense as a result of her arrest.

It cited the department's code of conduct, which states, "We use the minimum force and authority necessary to accomplish a proper police purpose. We demonstrate self-discipline, even when no one is listening or watching."

The department posted the announcement at 6:13 p.m.

Although the posting did not state whether Schoen would be charged criminally, the Milwaukee County district attorney's office did not file charges, according to Anne Schwartz, spokeswoman for the Police Department.

Contacted by email Monday night, Schwartz said she was not at her office and could not provide more information.