aired the week of July 25, 2016

Forty Thieves by Thomas Perry follows husband and wife P.I. team Sid and Ronnie Able as they try to track down the killer from a year old murder.  However it seems an unnamed party does not want the murderer to be found. So they have hired husband and wife assassin for hire team Ed and Nicole Hoyt to stop the Ables.  What is it about this murder that makes it so important that the killer not be found?