When headlines read, “Bear Sterns prosecutor builds case on e-mail,” how to keep or destroy electronically stored data may sound like a new business challenge. It doesn’t need to be, according to Derek Witte, who formerly practiced at Miller Johnson in Grand Rapids and now is an assistant professor at the Thomas M. Cooley Law School there. Witte’s specialties include using electronic documents in civil suits. Compared to conventional paper-document recovery as evidence in a civil case, using electronic documents should not be more difficult or expensive, he said…