Kidnapped (2006)

When the son of a wealthy man is kidnapped, the parents are called and told not to involve the police. The mother wants some kind of assurance that they will get their son back, so the family lawyer tells them of a man who specializes in bringing back kidnap victims. He comes and he's not exactly people friendly but will do whatever he has to to bring their son back. The boy's bodyguard, who is shot and placed in a hospital, is found by his brother-in-law, an FBI agent, who is thereby told about the boy's kidnapping. He goes to the family and, knowing the specialist they've hired, tries working together to bring the boy back, but they learn that there's a lot more going on.