leak - n. disclosure of information not known previously often from a person who doesn’t want his or her name known
source - n. a person who provides information to a reporter, often without revealing his or her name
surveillance - n. to keep careful watch of people
practice - n. how things are done by an organization
classified - adj. information considered secret by a government or government agency
oversight - n. to provide review of activities by people and or government
whistleblower - n. a person who provides secret information about bad or illegal activity
booster - n. someone that supports or champions someone or some group