I watched this yesterday so many of the things I'm going to say are coming just from the top of my head.Okay, so the top of my head is: WOW. Kudos to Shaka King for this truly great movie.The movie takes us rapidly through the start, development and downfall of Fred Hampton (Daniel Kaluuya) and, by that, the whole Black Panther party, and how the FBI focused on Hampton form the very beginning.I say rapidly because when Spike Lee made one of his masterpieces, Malcolm X (1992), he took 3h and 20 min. to tell us. Now, even considering Hampton's life was way shorter, the astounding runtime of 2h and 5 min to mix FBI chasing Hampton and the Panthers, O'Neal and FBI relations and even Hampton's history itself.The side story is the romance between Hampton and his fiancée Deborah Johnson (Dominique Fishback).The title couldn't have been more accurate, given the movie is about the betrayal of Fred Hampton by Bill O'Neal (Lakeith Stanfield), a man who ended up admiring the activist, who was exactly the opposite of what the US government was in the 60s.Great screenplay from Shaka King and Will Berson, with efficient techniques and interesting themes (I really think this was a topic that should have been made way before).Good cinematography (not the best of all time, it's not a Deakins or a Lubezki, but it's certainly an 8/10), that allows you to get even more in the revolutionary movements, the betrayal of Bill O'Neal and even the importance of Fred Hampton).A 10 in acting: there are very few films with such an incredible acting ('Whatever Happened to Baby Jane', 'The Master' or 'The Godfather' are other examples). I love how Lakeith is glowing, because he's amazing, and he's going to have a great future. Even though, Kaluuya and Fishback take the stand here as the stars.There's a scene between Kaluuya and Lakeith that gave me goosebumps, and Fishback gives a masterclass of acting on the penultimate scene of the movie.I just have to say everyone involved in this movie, and the movie itself, have a great future.You can't talk about this movie without at least mentioning the next two characters in importance in the movie: Roy Mitchell (Jesse Plemons) and J. Edgar Hoover (Martin Sheen). They both give a good performance in very little time, and show they're really versatile actors (Martin Sheen can be pointed out, given the fact that he has to take the torch from the breathtaking Leonardo DiCaprio in J. Edgar, 2011, and he does it extremely well).Really enjoyable and one of the best movies of the year for me, and I recommend it to everybody.