Evans made a video before he entered the JC, explaining that he would not record it because he had nothing to hide, which makes zero sense. "I have nothing to hide" is the explanation you use for recording such a meeting. He claimed that his JC was for apostasy, an outcome that fits much better with his self-image as an exJW activist working to expose the organization. It certainly sounds better than, well...
In his book, he tells of the time that his wife found his phone with messages showing that he was 'sexting girls online.' He explains that this was not the first time she had discovered him doing so. He has other stories in his books which paint him as something of a perverted creep. One could easily imagine that the judicial committee wanted to learn more about what he would later term his inability to master his penis. Alas, we can't ever know for certain because he refused to record it. But which one sounds more plausible?