The subject of our FBI file today is armed robbery. One particular type of criminal is more dangerous than any other - the lawbreaker who operates behind the front of a legitimate business. That kind of man is more dangerous because he frequently is shrewd to the point of cunning - never actually committing the crimes himself, and leaving the dirty work to hired hands - protecting himself with perfect alibis. But for those upholding the law, knowing a person is a crook, and getting the evidence required are two big headaches - since a person is considered innocent until proven guilty...