The perfect movie

Rating: 10/10 (9 May 2020)

I've seen a lot of movies.one of the cons of watching a lot of movies is that you start judging and turn into some kind of critic. You start asking questions like why this happened? how did this happen? Etc etc.so when I finished watching "The Departed" I started asking questions.And rarely enough I found answers to all these questions.
*Question #1: why did dignam leave when Quenan was murdered?
when Queenan was murdered dignam was the only one who knew about costigan.captain ellerby was incharge and from the first meeting scene in the beginning it is safe to assume that dignam and ellerby didn't go quite well with eachother.so dignam wouldn't tell anything about costigan to ellerby.ao when he was offered to take a paid leave.he decided to do that for the moment
*Question #2: why did costello trusted costigan so much?
Costello didn't trust costigan that much at first but he trusted french and French trusted costigan maybe partly cause of his uncle Jackie.Also Costello cross-checked whether he was the rat and he turned out to be clean.so when Costello and French both was dead costello's lawyer contacted Costigan as he was the closest person to Costello alive.a question might arise that why didn't lawyer went to Sullivan then? Costello knew Sullivan for a long time than he knew Costigan.well the answer is Sullivan was his mole rate in the department so he couldn't let anyone know about his connection with Sullivan.
*Question #3 : where was the 2nd rat all along the movie?
Costello maybe appointed the 2nd rat to keep an eye after Sullivan.that actually makes sense cause 2nd rate was Sullivan's classmate in the academy and he was also in his team later. In the movie theatre scene Costello seemed to be knowing about Sullivan's new transfer. How did he know? That's right..the 2nd rat
*Question #4 : How did Sullivan recommend Costigan to be awarded a medal of honour as we seen him deleting Costigan's profile from the database before?
One,there should be a way to recover deleted files.An if not Sullivan printed out his profile information on paper before deleting.look again.he didn't have any reason to delete the file. When he found out that Costigan knows he is the mole.he panicked and deleted Costigan's profile.its my theory
*Question #5 : How did Dignam know that Sullivan was the rat?
This bothered me for a while.then I remembered before his death Costigan gives madolyn a envelope asking her to open that only when he says or he dies. Maybe that envelope containted information on Sullivan being the rat and it stated to contact Dignam.so when Costigan died Madolyn contacted Dignam and then he knew.now if Dignam had all the proofs he needed to confront Sullivan,why did he shot & kill him himself? My theory on this is Dignam is a hot blooded detective.When he found out the rat who was also behind his colleagues' deaths he couldn't wait for all those legal procedures and trials and stuffs and decided to punish sullivan by himself.
10/10 the perfect movie!