A man on a bike pedals for his life, being chased by armed assailants. He reaches his apartment building, drops his bike and runs inside. He pulls a digital camcorder from his backpack and is able to email out its contents before the men break in and asphyxiate him. This man, it turns out, is Leonard "Diddle" Callahan, and a college friend of Gus'. Shawn and Gus attend Doddle's funeral, where the minister says Diddle died from a hit and run accident on his bike. There, Shawn discovers, that not only was Gus in a singing group, but he has been estranged from Diddle, Tony and Joon for years and refuses to say why. Shawn also notices a mourner with a scar on his face who seems out of place there. Tony and Joon are able to speak to Shawn alone. They tell him Diddle was way too careful on his bike to die in an accident. They believe he was murdered, and they hire Shawn to find out what happened.
Spoilers ahead. Coverage follows the scope labeled below.
Complete story — includes the ending
The death of Leonard "Diddle" Callahan, a computer cryptologist who was the baritone in Gus's old college a cappella group, is suspected of being murdered, by the other two members ( Jaleel White and Kenan Thompson ). Although they both had a falling out with Gus, they ask Shawn to investigate, but he and Gus find themselves stonewalled at every turn by the police, and later, an undercover detective ( Tony Todd ).