I'm glad you've posted some input here so we can discuss this... I'm seeing something more like this... if not exactly this:
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The boots look to me like regular lace-up combat boots.. they are shiny, flat, and don't resemble the more modern "tactical boots" that look like a combination of sneakers and combat boots..
As for the helmet, most motorcycle helmets are rounded.. I'm seeing something more like this:
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Both the vest and helmet, which look very much real to me, can obviously be purchased online, and would be way more convincing in person than a motorcycle helmet and a down puffy vest with "police" glued to the back.
The reason I mentioned Dallas SWAT is that I think this person chose the look of this outfit based on what they think a police officer in swat gear should look like, which would make them somewhat local to the area.
If this person drove to the church and parked out of sight, they did so either wearing all of this crap (verrrrrry risky) or they at the very least had it in their vehicle. I highly doubt they would have been willing to travel any significant distance in possession of all of that (on the way there, and ESPECIALLY when fleeing the scene), so they probably live very close by.
note: it's all IMO.. all of it.. every last drop
**EDIT: attached picture of helmet from last video clip of suspect