Jabari Bird remains on Boston's roster as the Celtics and the NBA take their time in determining how to proceed. Bird's contract can be voided if the League determines there is sufficient cause to do so. Forget waiting for a trial to occur on the kidnapping and assault charges. The Massachusetts justice system simply does not move that quickly.
It is highly possible that all involved parties are moving slowly on the matter to avoid further violence as a decision is close to being reached.