Philadelphia District Attorney Seth Williams usually does his crime-fighting in the courtroom. But early Sunday morning, he found himself chasing down a criminal on the street, when an allegedly drunk driver blasted past him and his security detail going the wrong way on a West Philadelphia block.

The incident ended only after Chanae Morris, 24, of Ridgewood Street near 54th in Kingsessing, crashed her 2013 Chevrolet Impala into another car, Williams' spokeswoman Tasha Jamerson and police spokeswoman Officer Christine O'Brien said. Morris was arraigned this morning and ordered held on $7,500 bail for driving under the influence, criminal mischief, simple assault and recklessly endangering another person, Jamerson said.

The 12:51 a.m. incident started when Morris allegedly sped past Williams' security detail on 63rd Street near Girard Avenue. When officers tried to pull Morris over, she ran through several red lights and crashed into a car westbound on Haverford Avenue at 63rd Street, O'Brien said. The driver of that car was treated at the Hospital of the University of Pennsylvania for unspecified injuries. Morris was uninjured; she faces a June 12 preliminary hearing.

Williams' security detail is composed of Philly cops, but they did not activate their lights or sirens because a 19th District officer responded immediately when Williams' detail alerted them, Jamerson added.

Williams was heading home after leaving a gathering of the International Student Athlete Academy youth organization, Jamerson said. That group had a fundraiser gala at Penn's Landing Saturday night, according to its website.