

Might be easiest to just drill out the mic and camera, and use a usb headset for calls. I also suggest specific threat modelling and learning about opsec as that may help you feel more in control. After that, please look after your mental well-being. We all should.
Either he was arrested with no record of the arrest (i.e “disappeared”) which is a new line for the administration to cross, or he disappeared for another reason (by himself, or with help or coercion by a foreign entity like the CCP), and the FBI is investigating.
I hope journalists keep on this because the first option would be a huge problem that everyone needs to know about, but without more information, the second is also a possibility. The CCP is known to have agents in western countries that manipulate and pressure ex-pats to return to China. Keeping an open mind now will also strengthen the argument if evidence for the former comes to light.