When I was in law school we would always hold a party along the Boston Marathon Route about 3 or 4 miles short of the finish line. The BU students would be closer to the finish line, and when I first heard the tragic news that there were explosions near the finish line, my first thought was that BU students would be harmed, and sadly enough, one of the fatalities was a BU student.

It may take time to identify and arrest the responsible party, but the case will be solved; it's a mathematical certainty.