Ages 15 through adult: Mark and Amy are bright college juniors, a couple since they were toddles. He is a computer major and she is pursuing the study of art. They live in separate apartments in the same building (Mark sees no reason for 2 apartments). They witness a murder, but the corpse disappears before the police even see it. Because they fear their role in the case may be leaked to the killer if they work directly with the police, they choose...