If your wife was taken away from you by her father using force, it is she who has got to complain against her father with the police for kidnapping her, if she is not in a position you may lodge a complaint on her behalf to rescue her from her father's illegal custody. You can also lodge a complaint against him for kidnapping you minor son and having illegal custody. If the police is inactive and there is no trace of your child or your wife, you can even file a haebus corpus petition before high court to produce them before court. This is legal procedure to be followed. What you suggested is an illegal act. No opinion can be given to support an illegal cause or act.