Charles Crabtree, 72, and Ryan Hute killed in collision between bus and semi truck on I-74 near Bloomington, Illinois

Many questions about what led to Wednesday night's crash remained unanswered Thursday, when the Maroons took the court for a game against crosstown rival Centennial and the Normal West community mourned Charles Crabtree, the 72-year-old school volunteer and bus passenger who died in the head-on collision.