That's why I have been saying that I believe Michael was already dead when he was took to the hospital. His brain could be living yet, but as he had no pulse or heart beat and also was not breathing surely for long minutes, I can't believe he still could have had chances to survive or that even was still with life. The doctors at the ambulance/hospital probabilly perceived he had no chances any more but, as usual, kept doing their work and tried to save his life in all ways - it was MJ, not a common person.
And what is disturbing me even more is: if Murray was trying to ressucitate him but had not success, wtf didn't he put Michael in a car and rushed to the hospital himself??!!! But no... he preferred to try, try and try to solve the situation with his own hands and, in the meanwhile, Michael's life was going away with no chances of return. When someone have a heart arrest, each minute means less chances of life SERIOUSLY, so you must RUN as fast as you can to save him!
Something is not right here for sure. Mistakes were made.