My theory is that CM got called to come to MJ's house later that usual.
CM's live-in GF testified, IIRC, that CM usually left around 9-9:30 pm to go to MJ's.
This particular night, wasn't CM called around mindnight to go to MJ's?
CM may have been pizzed over being awakened from sleep or from just waiting for MJ's call to come... which prolly had prevented him from talking to his other GF's.
CM then hurridly put MJ to sleep as soon as he got there so that he then could sleep for several hours and talk to the other GFs.
I agree with several others here that believe MJ died hours earlier & that he was stone cold dead, after CM woke up, after his personal calls and then finally went to check on MJ. (Did CM ask himself: "If I don't hear him, or see him moving, he must still be asleep."?)