Most people understand they need specialized training for any role above some minimum level, and they must compete for that training, and later compete on the job itself. They understand that the need for group survival dictates the rules of the game, and they must not disrupt the group process by uncooperative, dishonest, unethical, or violent behavior, or flagrant violation of the rules. Psychopaths can't or won't work at the high performance level that might logically provide upscale benefits. With extraordinary assistance from motivated parents, some more intelligent, but still antisocial people can and do gravitate to higher-paid management, politics, or the professions, where power and prestige can be significant ego enhancers. This odd behavior is the key classic sign of acute dysfunction.
Some reference books provide fascinating case histories describing typical incidents.
However, much of that verbal practice will have taken place in institutions or in dysfunctional families in lower-class neighborhoods. When those same answers are given in upscale surroundings, they come out as contrived falsehoods. By accepting a psychopath's statements at face value, without cross- checking public records or other sources, a careless or inattentive interviewer can fail to pick up on the frequent lies. Any pattern of lies will stand out as outside the norm of ethical conduct. By itself, this discrepancy is insufficient to classify the individual as antisocial, but it is an indication that other tests should be made.