What do Dr. Conrad Murray and Michael Jackson both know about his death?

This is a comparison between a 04/02/13 recording of Dr. Murray and an interview clip by Bonnie Vent on 10/26/10 where she is recounting a session with Michael Jackson at the Hollwood Rosevelt Hotel on 08/25/09.  

Links:
TMZ link with the Dr. Murray voice mail
http://www.tmz.com/2013/04/03/conrad-murray-michael-jackson-wrongful-death-lawsuit-voicemail-recording/

Bonnie Vent on San Diego Living 10/26/10
http://www.youtube.com/watch?v=80OF90zeOag