he obviously scouted and cased from the video, with low foot traffic in a location like this at night, to use a suppressor is less important than chambering rounds. the same reason any oda keeps their own armory, they don't take the chance that unfamiliarity with a new rifle might mean jams or failures, or not changing ammo before an engagement. there's a process for test firing any weapon, you want to know in gun ballistics are identical in field to training. for it to jam like that, not to mention stance. he didn't train with it, which means he's not trained enough to weigh the risk slapping a suppressor on it and the scrutiny and potential failure. dude's gonna have a search history worth explaining.    in the us, professional criminals are working with a separate team for recon, infil/exfil and evidence. they're smart enough to use their trade craft around evidence, a big part of that is not leaving anything at the scene and understanding ballistics and chemical forensics enough to prevent anything traceable ending up on the scene.  in venezuela and brasil we'd see guys pee on their arms after a hit, in the us they'll wipe down the gun and their body with vinegar and bleach. something high profile they've got an exfil team to handle evidence within 10 minutes of the hit. a suppressor at close range, even homemade, it's a big no-no for a number of reasons. not to mention it adds an automatic minimum of 15 years i think on top of any sentence.
United States