Yeah I wonder on what grounds the police can start unplugging shit in your house. This also happened in the Adrian Schoolcraft case - when the police burst into his house to take him in he was recording audio on one device which they found, unplugged and destroyed ... but they failed to find the second device (which is how we know). It's kinda wild how if the police might have a grudge against you, you'll have to setup multiple recording devices in case they break in and do some illegal shit.
There's a reason there's a song called "Fuck the police" and none called "Fuck the ambulance service" or "Fuck the firemen"