Entrepreneurs are often described in heroic terms. But few wear the white hat as well as Josh McAfee. A former law enforcement officer and loss-prevention executive, McAfee is CEO of McAfee Institute, a Peoria, Illinois-based business that trains corporations and law enforcement agencies to battle cybercrime and fraud. He's also tackling something far more ominous. Entrepreneur Josh McAfee told his story to Inc. staff writer Issie Lapowsky.