Arizona running back Ka'Deem Carey sails over Arizona State safety Alden Darby for a touchdown in the first quarter of their intrastate rivalry game at Arizona Stadium, Friday November 23, 2012.

Kelly Presnell / Arizona Daily Star

All charges have been dropped against Ka'Deem Carey in a domestic violence case, the city announced Friday.

The Arizona Wildcats running back was facing misdemeanor assault and disorderly conduct charges stemming from an alleged domestic violence incident in December involving his ex-girlfriend, who was pregnant at the time.

The charges followed an order of protection requested by the woman against Carey on Dec. 26. He was served with the order on Dec. 31.

In the initial petition, the 23-year-old woman wrote that Carey entered her room on Dec. 23 looking for a lighter to smoke an illegal substance. She told police that she asked Carey to leave several times, but he refused and shoved his way into the room, knocked her to the floor and slammed her fingers in the door.

The Star is not naming the woman because she is not being charged.

"A key witness for the prosecution is unavailable, and even if the witness were available, there is no substantial likelihood that a judge would convict Mr. Carey," the city said Friday in a news release.

Carey, a Tucson native and former Canyon del Oro High School star, was named a consensus first-team All-American as a sophomore for the UA last season. He led the nation in rushing yards with 1,929 and set school records for yards and rushing TDs (23).

The running back participated in spring practice with the Wildcats, which ended in April. He wasn't allowed by the UA to speak with reporters during that time.

Carey will enter the 2013 football season as a realistic candidate for the Heisman Trophy. He has been labeled as a potential first-round pick for the 2014 NFL draft by several national analysts.

The UA informally started a "Team Ka'Deem" campaign designed to get him attention for the Heisman at the end of his sophomore season. That campaign has died down since the charges were filed in late December.

On StarNet: See an interactive presentation on Ka'Deem Carey's huge 2012 season at

Mouse over the colored bars for details on rushing and passing yards and touchdowns.

Inset: Carey scores one of his three touchdowns against Nevada; photo by Kelly Presnell, Arizona Daily Star.