I don't believe Criss Angel is involved in the hoax. Criss Angel is known for the line, "Love Lives Forever" because that is what his Dad said to him when he died in his arms due to cancer. This line shows at the end of every MINDFREAK episode, which states. "This episode is dedicated to Criss Angel's father, John Saranatakos. Love lives forever."
Also, that building implosion escape occurred way before Michael passed away and Criss was in the middle of building the Theatre and getting fan interviews for the trailer of his live show (I was in one of the interviews but they were never used due to copyright information, etc.).
I also don't think Criss is involved in the hoax because I have been following his career from Day 1 and he showed no signs of really knowing Michael Jackson except for when he answered a fan's question at the LOYALFEST on his fanclub. She asked, "Criss, were you a fan of MJ and if you had to give a speech to him what you say?" Criss said, "Michael Jackson was a tremendous entertainer, I was a fan. My speech to him would be, "Rest in Peace Michael. I appreciate you giving me the opportunity to help you out with your This Is It concerts. I'm so sorry you passed away. It would have been a good show. God Bless Michael Jackson". Also, even before his TV show even got started all of Criss Angel's illusions were related and dedicated to Harry Houdini and Richiardi, not Michael, unfortunately. This goes for his LIVE show as well. Houdini was Criss' biggest inspiration and he named the show after him because the word Believe was his last word to his wife before he passed away because he believed some people would claim they could talk to him after he passed so he gave his wife a code word to go by, which was Believe. There is a video of Criss Angel explaining that which can be found here: http://www.youtube.com/watch?v=A5oRhBpbTrQ
This is just my opinion, of course. If you want to believe Criss is involved, which I kind of wish he was based on my point of view, then no hard feelings! Just sharing some helpful information. God Bless. :D