Guessing they were trying to find witnesses and found 'hey, a cyride bus should have gone through an intersection about that time, lets ask the driver'Surprised it took them this long to figure out it was a CyRide. Glad the family finally has opportunity for closure.
You've got to believe that the defense will be that he had no idea he even hit her. A vehicle that large. Totally plausible that the driver didn't realize something had happened.