The Wily Witness — Marlow Kelly

Probationary FBI Agent Finn Callaghan is having a bad day. It's his second day in the field, and he's stuck doing his partner's filing. A teenage boy, Noah Lewis, is arrested for stealing five hundred thousand dollars in diamonds, and Finn is convinced of his innocence. Then evidence goes missing and an eccentric old woman turns up claiming to have witnessed the robbery, Finn can't help but get involved.
Can he prove Noah is a gullible patsy or will the youngster be charged with grand larceny in the second degree?

Finn Callaghan is a character from the author's full-length The Gathering Storm Series.