I think you'd get admitted into a mental bin if you called up and said, "NASA is inside my brain, and I can see touch," without a hint of sarcasm.
I'm pretty sure cops can't be mentally unstable. Based on the news, it seems like mentally stable cops are the minority though.
Indeed. What if they're just temporarily insane? Like, they've been stricken mad with grief over the loss of their favourite sniffer dog?