Diary of a Serial Arsonist / Lost Clue
In 1987, hundreds of firemen are gathered for a conference in Fresno. Before and after the conference, a series of arson fires is reported at fabric and craft stores.

Fire investigator Marvin Casey studies the fires, and believes he has a serial arsonist on his hands.

He follows every lead he has but can't shake his nagging hunch that this arsonist has something to do with the fire conference. He considers the theory that it could be one of his own, a fireman attending the conferences.