Note that Michael Stenger was forced to resign because he didn't do enough to stop the supposed attack, and that he spent 35 years in the Secret Service. These are hints that his death was faked; there was motivation to do this to save him from any liability. Note also that no cause of death was given, but no medical examiner handled his death either. A reading is that they couldn't get a natural cause of death on paper, so therefore they left his death completely ambiguous.

A lot of suspicious deaths are real, but not all of them. Spooks can't just kill anyone they like without it ever going wrong. There's more motivation to fake deaths: it doubles as a scare tactic to anyone who isn't naive but doesn't have the full picture either, so that they will never blow any whistle themselves.

It's true that Stenger had started to spill the beans about the artificiality of Jan. 6, but this could've been a calculated and acceptable freebie that was given. Although I'll admit that it's hard to distinguish a real from a fake death, and that this conclusion is preliminary. It'd be helpful to look for similar patterns when it comes to related suspicious deaths.