Wow! That’s a tough situation. It’s much harder to address inappropriate behavior with ODD. It may be time to work with a therapist on this issue. These articles offer some good strategies on ODD:
More Than Just Naughty: Dealing with Oppositional Defiant Disorder
Penny
ADDitude Community Moderator, Author & Mentor on Parenting ADHD, Mom to teen w/ ADHD, LDs, and autism