How does investigative journalism differ from other forms of journalism? What effect has investigative reporting had on the public's perception of government?

What will be an ideal response?

An ideal response will:
1, Define investigative journalism as a type of journalism in which reporters investigate a story in depth to inform the public, correct injustice, or expose wrongdoing.
2, Explain how this is different from the other forms of journalism, such as journalism that seeks to interpret the news and place events into context to help citizens make sense of a complex world, and journalism that aims to socialize citizens by teaching the political facts and opinions that form cultural and belief structures.
3, Consider that investigative journalism has had a hand in the extensive coverage of scandals that have led to a general American cynicism of politics and government.