Watching Jake Gyllenhaal’s The Guilty, it is not hard to believe that the dark thriller is portraying real events — so, is The Guilty based on a true story? Set to the backdrop of the California wildfires and with a subplot involving police brutality, The Guilty's story holds a certain sense of veracity. As The Guilty is a remake of the 2018 Danish film Den Skyldige, one would need to trace the story back to its source to find the truth. Though the subplot of The Guilty's main character, Joe Baylor (played by crime-movie star, Jake Gyllenhaal) involves an episode of police brutality that is not in the original Danish film, both films focus on a call-center operator becoming involved with a kidnapping.

https://screenrant.com/guilty-movie-true-story-inspiration-real/