Since I don't remember, I'll just list off what I'm thinking.

The experiment depends on what group he was taken by, and who they are affiliated with. If he was taken by the Lost, he would likely by given common but deadly toxins to test. The nexus would likely not care, and New Order would pull out all the stops. I'm not sure what each of the cells would do, but SOUL would try out a couple poisons and then execute him if he came out positive. Lost would probably keep him around, and the New Order would do something I cant say ^_^

If you want the specifics let me know.