Arson dog Shasta, 6, a black Lab, leads Dan Young, the senior investigator for the Maine Fire Marshal's Office, into a home for training during the annual State Farm arson dog program recertification class at the Yarmouth Fire Department training facility Tuesday.

Arson dog Scooter, 9, from the Rockland County Sheriff's Department in New York, rests during the annual State Farm arson dog program recertification class at the Yarmouth Fire Department training facility Tuesday. This is Scooter and owner Doug Lerner's eighth year visiting Maine to be recertified.

Arson dog Daz, 3, a black Lab from the Salt Lake City Fire Department, waits for a treat after pointing out a liquid that could be used to ignite a fire during the annual State Farm arson dog program recertification class at the Yarmouth Fire Department training facility Tuesday.

Tom Accoglio of the Gloucester County Sheriff's Department in New Jersey receives a kiss from his arson dog Roxy, 3, during the annual State Farm arson dog program recertification class at the Yarmouth Fire Department training facility Tuesday.

Steve Gallagher, assistant chief of the Chillicothe, Ohio, Fire Department, leads his yellow Lab Gunther, 3, for certification for the first time during the annual State Farm arson dog program recertification class at the Yarmouth Fire Department training facility Tuesday.

Steve Gallagher, assistant chief of the Chillicothe, Ohio, Fire Department, leads his yellow Lab Gunther, 3, for certification for the first time during the annual State Farm arson dog program recertification class at the Yarmouth Fire Department training facility Tuesday. The dogs sniff for liquids that could be used in starting a fire.

Kai, 6, wears a tag from the San Antonio Fire Department Arson Bureau during the annual State Farm arson dog program recertification class at the Yarmouth Fire Department training facility Tuesday. It was Kai's fourth year coming to Maine to be recertified with owner Justin Davis.