Fireball - Sammy & Brian Mystery #15 Book

Sammy and Brian are on a spot--a hot spot. They are challenged to solve a year-old mystery. It starts with an arson case in a courtroom and ends with a cloth rope around Brian's neck.
The fire marshal rules the house fire accidental. When the insurance company finds traces of gasoline in the ruins, it refuses to pay the claim.
Who would gain from the torching of John Shelly's house? Many suspects surface, but only two people know the truth--the arsonist and the man known as Deep Eyes.