Martin McDonagh’s darkly comedic crime drama Three Billboards Outside Ebbing, Missouri is so timely and realistic that it could easily be based on a true story. The movie follows Mildred Hayes (Frances McDormand), a Missouri woman who becomes so frustrated with the local cops’ failure to catch her daughter’s killer that she rents three roadside billboards to call them out. With the relatable fury of a grieving mother and a simple yet effective form of activism, Three Billboards Outside Ebbing, Missouri is so believable and life-like that it seems as though it has to be rooted in reality with elements of docudrama.
https://screenrant.com/three-billboards-outside-ebbing-missouri-true-story/