The Client

Here's another by John Grisham...
Eleven- year old Mark Sway and his younger brother were sharing a forbidden cigarette when a chance encounter with a suicidal lawyer left Mark knowing a bloody and explosive secret: the whereabouts of the most sought - after dead body of America.
Now mark is caught between a legal system gone mad and a mob killer desperate to cover up his crime. And his only alibi is a woman named Reggie Love, who has been a lawyer for the past four years.
Prosecutors are willing to break all the rulers to make Mark talk. The Mob will stop at nothing to keep him quiet. And Reggie will do anything to protect her client- even make a last, desperate gamble that could win Mark his freedom... or claim both their lives.