A lawyer friend back in law school heard that people who go into law are disproportionately psychopaths seeking the ability to manipulate society and power over

A lawyer friend back in law school heard that people who go into law are disproportionately psychopaths seeking the ability to manipulate society and power over people for personal benefit. They tested it by somehow sneaking in psychopath test questions to other law students (without them knowing), who “passed” (not in a good way). This is anecdata, but I found it convincingly told. I wonder whether a proper study would assess it (having doubts that would be allowed).