First point. Sound does carry, at night. Breaking glass could potentially be heard from some distance away. The rain would muffle the sound. More important rain would reduce visibility, and reduce the chances of somebody seeing the suspect outside the church, and calling police.
Respectfully, have you studied a map of the area around the CCoC? It's on a hill all by itself. The closest business is SWFA. All others are miles away. I agree the rain made SPs visibility less likely for passengers in vehicles driving along Chris Kyle Memorial Highway the ability to spot SP.
Second point, respectfully I'm sorry but that logic is totally faulty. First, if MB was targeted, which I don't think there is any evidence she was. Why would the suspect care if her husband was away, or home with the kids? If he wasn't planning to kill MB at home, why would it make a difference of her husband was out of town or not?
Perhaps the SP did know MBs husband would be out of town, after all, BB posted it onto his FB pg the month before, in March. In most murders of a spouse, it is common for LE to investigate the surviving spouse thoroughly. BBs bucket list trip even have some of us most curious. With that stated, it was a golden opportunity to kill MB since her husband was out of town, SP knew LE would be busy digging into BBs activities.
Second, how would the suspect know that MB would be alone? She almost wasn't. What if one of the campers arrived before MB? What if another instructor showed up to help MB, for some reason? That would be a terrible plan. That window of opportunity would be way too small. The suspect would be racing against time, hoping that MB wasn't running a few minutes late, or one of the campers didn't show up a few minutes earlier. If any of them did, he would be going to prison for a long time. Does that really sound like a chance the suspect would take?
Not sure what you mean by "she almost wasn't" alone. Her daughter typically attended the next CG training class with her mother. After the 5am class ended, MB would return home to get two daughters prepared for school. Then, her other daughter would go to the next training session with her mother. Only one trainer is needed for a CG session. MB was not known to be late for her jobs. And, by the way, CGs did arrive at the Church very early. They simply stayed in their cars until 5am.
Third, the only person who would be able to carry out such an elaborate plot would be someone not only with intimate knowledge of MB's work schedule and work routine, but also her entire family's schedule. Only a few people could possibly been privy to all that knowledge, and they have all been cleared of possible involvement a long time ago.
Absolutely, SP knew quite a bit about MB and her schedules. Her itinerary was an open book on her public Facebook. SP knew because BB posted the fishing trip. MB posted her trip to Austin. MB posted if it's raining we're training. SP knew she would have class even if it rained because SP was watching and waiting for the most opportune time to attack.
The targeting theory is far fetched to begin with. Ad in the incredible amount of detailed knowledge the suspect would have to have had about MB's personal life, it becomes an impossibility IMHO.
SP was not nervous one bit. The light tapping of his fingers along the wall was a sign of confidence. SP was performing simple search and clear missions in the Church. SP was trained to withhold emotions while maintaining vigilance. SP knew the plan of a near perfect crime would keep SP out of prison.