So, setting aside this claim that there’s no line of sight, my bet is these guys have not kept up with what quadcopters and hexacopters can do: here’s one video from 6 days ago showing really unnatural acceleration, changing direction in ways that make you say “UFO” [0] - check out the other videos on the channel, there’s another one six months ago hitting 234mph [1] - granted these are LiPo with short dwell times but other larger heavier models can go 90 minutes… so somebody out there has something custom and is having fun freaking out cops and militaries. I’d say next time instead of trying to chase it they start sweeping for radio transmissions… if they’re not already programmed to autonomously play cat and mouse with police helicopters XD