S6-10 Guest Characters>> D.I. Hughes (David Schaal) 6.12 (272) - 6.13 (273) | 2002 Investigates the hit-and-run Ryan and Tara are involved in at Christmas 2002. Questions both, where due to his insistence of everything pointing to Ryan being the driver, Tara gives in and puts the blame on Ryan leading to his attempted suicide.