A woman accused of dragging a police officer and slamming into several cars while fleeing a traffic stop, prompting a nearly two-mile chase through the streets of Boston on Tuesday afternoon, is facing nearly two dozen criminal charges.

A woman is under police guard at a city hospital after she was arrested in connection with a destructive pursuit that started in downtown Boston and ended in the South End.

After searching the woman's other items, police say they found a silver tin, with about four grams of "a brown powdery substance believed to be fentanyl," and about two grams of a "small rock-like substance believed to be crack,” police said. A bottle with a substance "believed to contain methadone," was also found in the car.