Briefly, from what I understand a whistleblower is someone who exposes activity deemed illegal within the organization itself, essentially overriding its interests (see below).
Whistleblowing is an act of a man or woman who, believing in the public interest, overrides the interest of the organization he/she serves to publicly blow the whistle if the organization is involved in corrupt, illegal, fraudulent, or harmful activity. — Ralph Nader, consumer advocate and activist Global Investigative Journalism Network http://gijn.org/resources/whistleblowing/ Best All, —Venantius J Pinto
