Apparently now, there have been multiple phone conversations going on simultaneously right "before noon".
Take for example the revelation that Dr. Murray contacted a patient regarding test results at 11:54am. This is allegedly documented in phone records. How could Murray calmly make such a call if MJ was immediately in distress after receiving Propofol at 10:50am? Ed Chernoff, Conrad Murray's lawyer, says that Murray's recollection of the timeline was a "mistake", and everyone makes them.
But you could say, well, perhaps Murray found him at 11:55, which would still make it "before noon". Unless he was performing CPR while making additional calls this does not make sense, as he finished his final call at 12:13pm:

Here is video of Brian Oxman saying that he received a call from Randy's assistant (Randy Phillips or Randy Jackson??) that MJ was already taken "from the hospital" at some point "before noon":
(embedding was disabled on video so click YouTube link after hitting "play").
Even if this is a Jermaine style slip up and he meant taking MJ "from the HOUSE", how could he have left the house before noon before 911 was even contacted, or before Murray even realized MJ was in distress?
Special thanks to 77_Sunrise_77 who had sent me the Oxman video link.