Before Waco and Ruby ridge. There was Gordon Kahl.

Death & Taxes - The Gordon Kahl Story (1994)

Before Ruby Ridge and Waco, there was Gordon Kahl. This top-rated documentary at the 1994 Melbourne Film Festival takes us from an unlikely gun battle between the IRS and North Dakota farmer Gordon Kahl, to an historic cross country FBI manhunt, ending finally in Kahl's mysterious and violent death in Arkansas in 1983. All of this, over taxes?
Exhaustively researched by Jackson over nearly 10 years, this 1993 documentary covers in great detail the subsequent local law enforcement investigations which uncovered serious inconsistencies between the physical evidence, new evidence derived from Kahl's exhumation, and the official story coming out of the IRS