There are plenty of LSD burnouts who claim to be from Mars or controlled by people beaming signals at their brains. It comes from years of intense psychotic episodes induced by mind altering chemicals.
It doesn’t mean that their claims of being mind controlled have any merit.
Some of this lawyer’s clients may believe that they are being controlled, but that may just be because of past voluntary and/or involuntary ingestion of LSD and other substances. But the “claim” of control itself may be untrue while the damage claim is true.
So why do you have to include the “Mars” thing? There are some very credible stories, and there are some very credible technologies which can do the things that are described.
For example, the same frequency of microwaves that are used in a microwave cooker, if pulsed at audio frequencies, causes body tissue to micro-expand in sympathy with the heat, causing a sound that appears to be coming from nowhere.