Best Investigation movies on amazon prime that are oscar winners

Actors : Albert Finney, Julia Roberts, David Brisbin, Dawn Didawick,
Directors : Steven Soderbergh,

An unemployed single mother becomes a legal assistant and almost single-handedly brings down a California power company accused of polluting a city's water supply.

Actors : Kim Darby, Jeremy Slate, Glen Campbell, John Wayne,
Directors : Henry Hathaway,

A drunken, hard-nosed U.S. Marshal and a Texas Ranger help a stubborn teenager track down her father's murderer in Indian territory.