 The witness's description of the man led authorities to view the unknown person as a prime suspect in the Lyon sisters' case and two composite sketches of the man were created.Police investigating the case followed up on reports from several people who said they recognized the sketch of the unknown man with the briefcase.Press reports indicated that a man matching the sketch was seen a few weeks earlier at the Marlow Heights Shopping Center and Iverson Mall, both in neighboring Prince George's County, Maryland.