If you went and spoke to his parent, you would probably find a mother on her own who is out working and not aware what her offspring is getting up to when her back is turned. If by some remote chance a father is on the scene, he should be told what is going on so that he can do something about curbing his child's intimidating behaviour before the police are brought in. You do not have to take your boys along, but if you do, it would strengthen your case even if they were only standing within viewing distance of the front door. If there are any denials, which there will be from the youth, you can then call your boys in or go to them to question the validity of the denials. When you leave and return home you must write down all you remember of what took place on the door step for future reference. Best of luck.