“You have to maintain contact with the witnesses for up to a year. You can send a subpoena, but that doesn’t mean much without a follow-up call,” says Osby. Then there are pretrial interviews that must be arranged, which is Osby’s task for the day. What I’m trying to do is get an established line on where these folks hang out at, how they live. So when the time comes, I have a better grasp on how to stay in touch with them, as opposed to them disappearing on me.