Hi Little One!
I would never have tried an intervention on Dino. He already knew he had a problem. He already felt singled out and ganged up on. It sounds to me like the addict in your life also already knows he has a problem. Also that he is aware that the family knows he has a problem. Interventions are designed to help the addict become aware, and a well planned one has a rehab bed waiting.
Go to this site...
www.intervention.com to find out more about professionally run interventions. I will also ask a couple of the other moderators who have some experience with intervention to address your post.
Hugs,
Smoke