User blog comment:TimeSoul/The Phantom Shadow?/@comment-99.245.46.248-20120406031257/@comment-174.93.170.253-20120407110442

Cam. At lunch before the assembly, Lee told Cam to watch his drink because he had to go bad.

Cam possibly thought " Now's the chance ". But I don't think Cam was behind it. My theory:

Wurst hypnotised him to do it.