the cameo twins never even took a shot
their corporate masters want a war with china. it's the new russia russia russia.
handler had keys. maybe the patsy even slept there. betting the pro shooter was shooting out of one of the windows there. probably one of the three "snipers" guarding the inside of the building. handler, pro sniper, getaway driver. then they all split before these cops showed up.
he had a half hour
we know from the audio tracks the speed of the bullets, so even if you try to work the math from the shutter speed and don't get the same result, it's something in the camera software, not a magic hypersonic bullet.