Can I ask how old he was at the last evaluation? While it is entirely possible that your son is rare and only ODD (I have enough medical weirdness that I know never to say never, LOL), some things are better seen at certain ages.
I think it is kind of like shoes. We measure the kids' feet on a regular basis, sometimes it seems like they outgrow shoes weekly! We don't use the same measurement each time, we take new ones and get new information. Children's brains are developing and changing rapidly throughout childhood and into their 20s. A measurement done at one age will give some information. At another age you will get other information. sometimes you need it all to see what the issue is.
What might help is to have all the info from ALL the evaluations organized so it can be viewed as a whole. If you go to this link (it is to our General Archives) you will get information on how to do a Parent Report. It is a helpful way to organize the information you have. I know the report we did for my son was like a Bible, we carried it everywhere. We took it to all the professionals, not necessarily all the schools, but the professionals were all asked to read it and to add it to the files.
http://www.conductdisorders.com/community/threads/parent-report-updated.225/
If your son has been through the professionals with no hope, maybe something in our Natural Treatments forum will give you some helpful ideas. I know my son (and my other children) react to certain food additives, preservatives and food coloring. Other people have food allergies or sensitivities (acts much like an allergy but allergy tests are negative - VERY frustrating, but also very real) that cause behavior changes and problems.
If you haven't read it, The Explosive Child by Ross Greene is also helpful to many. It is a fairly easy read.
hugs,
Susie
