CPF 418 crew of Capt Gary Cinnamon (MPS). Capt Andrew Civin (MPT). and Lt Steve Wormley (MSS) responded first to request for crew to perform route search for missing Beech B33 flying from Red Bluff KRBL to Reno Stead Airport. Crew launched and was enroute to Lake Almanor area to begin route search toward Nevada destination. We were working in conjunction with 2 CAP aircraft from Nevada Wing. CPF 2722 was performing west bound route search and 2725 was performing high altitude electronic search for ELT.