Updates on two big stories from yesterday: Senator Kennedy is out of MGH, and the woman found dead in Mission Hill has been identified as a Northeastern student. Kennedy's apparently planning his course of treatment as though it was a legislative bill, grilling experts and seeking out multiple options. There is no indication that he would have to step down as senator, but if it were to happen, there'd be a special election to fill the spot. It's not known whether the slain Northeastern student knew her attacker. The police continue to investigate.