@Whiskers16 - thank you for the great recap!
As to the shots the neighbors heard, here is the best that I have found, from a 10/17 CNN phone interview Ashleigh Banfield did with the neighbor.
CNN.com - Transcripts
JS, CLOSS` NEIGHBOR: We had come home about 11:30. We went to bed about quarter after 12:00. We were not sleeping and we heard the first shot and just a couple seconds is the second shot. And I asked my husband, I said, were those gunshots? Because they were so loud? And he said, yes, and he said, it`s a big gun and
I rolled over and looked at the time on my clock, and it said 12:38. My clock is off by seven minutes per the Sheriff`s department, so this happened roughly around 12:30.
BANFIELD: And you said you heard those two shots and by your best recollection, those shots were a couple of seconds, like two, three, four seconds in between?
JS: It was just bang and bang. That close together.
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BBM
I noticed that the time mentioned was 12:38, with the clock being off by seven seconds. Any chance that the clock seeven seconds was slow instead of seven seconds fast, placing the time they heard the shots at 12:45? This would have a much shorter window of time between when the shots were fired/heard (perhaps the fatal shots to JC) and when the 911 call was placed.