Sunday, April 26th TV listings for Investigation Discovery USA - Pacific
Murder by Numbers Dog Days of Murder
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 they're searching for the killer or another victim.
Murder by Numbers Blood Mountain
A woman is found murdered on the Appalachian Trail and her husband is missing, leaving authorities to wonder if he's the killer or another victim, then more bodies begin to appear.