I've been going back and re-examining the timeline. Timeline states suspect in police gear was captured on surveillance video at 3:50 a.m. Missy enters the church at 4:20 a.m. Participant in her class arrives in parking lot at 4:35 a.m. 9-1-1 calls are made at 5:00 a.m.
However, paperwork from the police department states that Missy was setting up her room for the boot camp for "about 30 minutes," at which time she then heads towards where the suspect is waiting. Neither is seen on tape again. If this is accurate, that would mean she entered the building at 4:20 but did not head towards the suspect until 4:50 a.m. That gives the murderer only 10 minutes to murder her and escape before her body is found at 5:00 a.m.
It also means at least one of the bootcamp participants is in the parking lot at the time of the murder (they arrived at 4:35). Granted, they may have been listening to music and unable to hear any screams within, but they would have seen a person dressed in police gear leaving the door to the church; that means the murderer left through another entryway - which would have added to what they had to accomplish in that short 10 minute window. Police arrive at 5:10 a.m., at which time presumably the murderer would have been unable to leave the parking lot by vehicle.
And why is it after Missy is murdered is the suspect not seen again? Did they leave through a window? No surveillance cameras in that portion of the church? Reports have indicated her body was located in the southwest corner of the church, so with her body being discovered at approximately 5:00 a.m., people would have been inside the church heading towards her body for at least a couple of minutes before it was found. That cuts an already close 10 minute window even closer...
So if these reports and police documents are accurate, imagine this from the murderer's point of view. You've been in the church since 3:50 a.m. waiting on Missy to show up (assuming this is a targeted hit). You surely hear activity within the church when Missy enters at 4:20 a.m. Missy likely is going back and forth to her vehicle several times in order to bring the equipment inside (although it is likely this ended by 4:35 since the person in the parking lot did not enter with her to help bring any equipment in or help to set up the room, which would be the most likely scenario). Very strange they did not go to her but rather remained where they were and waiting for her. So from 4:35 they simply lie in wait for her to come to them until she finally does so at 4:50. Imagine them looking repeatedly at their watch, knowing class starts at 5:00, and knowing that anyone else could enter the church at any moment. They know they have to kill her (with a hammer, no less) and get away before anyone can stop them and at 4:50 a.m. they now only have 10 minutes before class is scheduled to start. You know Missy is physically fit and there's the possibility it will take at least several minutes to subdue her (unless she is attacked first from behind and knocked out - however, autopsy report states she dies from puncture wounds to head and chest - not head and back, suggesting a frontal assault). You've been waiting 30 minutes since you heard her enter and she's still not coming to where you are, so do you go to her (which for some reason they did not want to - was there surveillance cameras in that room and they feared their face might be exposed in the encounter with Missy?) or keep waiting even if that means you miss out on this opportunity? Is it possible they made noise to lure her to their area? Call out to her? Or were they so confident of her schedule they knew she'd go to that corner of the church before she started class (use bathroom; pick up class roster; something else?)?
If they waited until 4:50 a.m. to murder her, they had nerves of steel. That would seem to indicate this was not their first rodeo.
