You better call Duncan right away; things are getting weird. Mary ought not to be in school today, or at least she should be upset at you in some way. The cops should have come looking for you last night, or this morning, or now. Someone should have mentioned the accident.
You tell the teacher you need to go to the bathroom. She scowls and lets you take the hall pass. But you don't go to the boy's room. You go to the payphone in the front of the school and dial the number on the card Duncan gave you.