The House of Pain by Franklin Allen Leib
When a spoiled teen is kidnapped outside her prestigious prep school, her parents are faced with the horror only those who've lost a child know. In their desperation and afraid to contact the police, they enlist the help of millionare "Crazy Johnny", a former Vietnam tunnel rat. A sufferer of post-traumatic stress disorder due to the brutality he watched children endure in the war, he agrees to help the girl's father, but is afraid that if they pay up the girl will be killed anyway. Crazy Johnny tracks down the kidnappers, determined that the only way to save Sally is to free her by force. Blood is spilt and only in its aftermath does the true nature of the crime emerge. It is then up to the US legal system to judge Johnny's vigilantism, and up to an old-time attorney and a young African American woman lawyer to see that justice emerges from the courtroom.