Insiders (2002)

John Carter lives with a deadly secret, kept even from his young wife and child: a former secret life working as a hitman for a shadowy political organisation. When Carter's peaceful new life is shattered by the murder of his family, the police begin to investigate his mysterious past, and the only friend he can turn to is a fellow hitman named Karl Loveberg. Karl draws John back into the dark world of contract killers - a world he thought he had left behind.