"Anon" is a 2018 science fiction thriller with an interesting premise made all the more relevant with recent privacy concerns. In the future as imagined in the film, society has traded privacy for security. By law everyone automatically records everything they see and hear and these recordings are available to the government. Solving crimes thus becomes routine and detectives enforce the law requiring the recordings as well as any other crimes. However there are people who are skilled enough to hack the system and, for a cash fee, will splice a client's real memories with artificial ones, including anyone else who saw the event. And there are some people who seem able to stay off the grid entirely. I thought it was well done. You can read more at https://en.wikipedia.org/wiki/Anon_(film)