Murder by Numbers

In Billings, Mont., firefighters respond to a fire at a duplex and find two bound and gagged bodies; the victims house mate is nowhere to be found, prompting police to question whether theyre searching for the killer or another victim.

Firefighters find the bullet-ridden bodies of Robert and Dorothy Pape while responding to a call about smoke billowing from a garage, in which they find a truck on fire; later, police realize the smoldering truck does not belong to the homeowners.

In Amherst, N.Y., a missing college students body is found hidden in the woods near a bike path, making the townspeople realize that the predator who has been stalking women for years has escalated from rapist to killer.