My boyfriend took custody of his niece and nephew about two years ago, who are violent and have been in and out of group homes and he felt sorry for them. He tried to teach them responsibility and to give them what they needed to get started in life - community college, job corps, etc., but they continue to get into trouble and return to his home, although he has told them they cannot come back home. He has not changed the locks, but he is getting ready to pack up their stuff and put it out on the porch and then change the locks. They are both over 18, so is this legal? Their names are not on his lease as tenants. Thanks.