“ The security cameras in the VIP parking lot were turned off two weeks before the car bomb was planted”
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Do you have a link to this?
This article mentions that security cameras had been switched off:
https://www.theguardian.com/world/2022/aug/23/tuesday-briefing-the-mystery-of-the-moscow-car-bomb-attack
I saw “two weeks” in another article that I can’t locate at the moment.
I recall that when Boris Nemtsov was murdered just outside the Kremlin the security cameras were also turned off. It may be standard FSB technique that they teach in their school for assassins.