The Legend of Boggy Creek (1972) – IMDb

Directed by Charles B. Pierce. With Willie E. Smith, John P. Hixon, Vern Stierman, Chuck Pierce Jr.. A documentary-style drama about the "Fouke Monster", a Bigfoot-type creature that has been sighted in and around Fouke, Arkansas since the 1950s.

Source: The Legend of Boggy Creek (1972) - IMDb