You mean like this one, from Defcon in 2013?
http://hackaday.com/2013/07/26/defcon-presenters-preview-hac...
Or The Defcon 19 How To CanBus Hack Workshop, that taught classes about this in 2011?
http://www.canbushack.com/blog/index.php?title=learn-to-canb...
Unfortunately for him, defcon prefers original content, not someone claiming credit for what has been demonstrated repeatedly in previous years.