A Delaware County judge granted the request by prosecutors for out-of-county judges to hear the case involving a former assistant district attorney who was allegedly involved in a hit-and-run.

President Judge Joseph P. Cronin Jr. did not set a date for the preliminary hearing for Michael Donohue, originally set for Dec. 27. He agreed to continue the hearing until the new judge has been assigned. Deputy Attorney General Joseph E. McGettigan is prosecuting the case.

On Nov. 4, Donohue, 31, of Haverford Township, was driving on Township Line Road in Upper Darby when he allegedly struck a 15-year-old boy crossing the street. Donohue, who was talking on the cell phone at the time of the crash, stopped for a second, and then left the scene. He had been out drinking with co-workers prior to the incident, according to court documents.

The Haverford teen, who suffered serious injuries to his head and hip, is now recovering at home.

Donohue was charged with aggravated assault, reckless driving and related crimes.

Contact staff writer Mari A. Schaefer at 610-892-9149, mschaefer@phillynews.com or @MariSchaefer on Twitter.