We've covered that we don't know roles explicitly form the PM's, I'll repeat beet's below too and let's look them over, see what the deaths indicate though as FT mentions let's keep in mind that these could be twisted, frames or other misinformation.

Beet's death tells us he was innocent and implies government connections, he claimed tracker though I think that is probably either not exactly true or he had extra info.

Strangled, drugs (planted or his), guilty

Shot, innocent, badge indicates cop

Okay, spent casing means he probably is the one who shot Taiga. Though not necessarily, a gun is not an uncommon weapon and it may indicate he fired it in self-defense unsuccessfully or in NK against a bulletproof character or had it planted on him. Still for now I think we can say reasonably safely...

3 killers, strangler, stabber, shooter.

Shooter (Praz), shoots Taiga.

Stabber knifes Praz

Strangler gets Artsapat

I'm going to guess stabber and strangler are still alive, Artsapat being a strangled female character its even possible she was a SK victim, or some screwed up role that acts normally unless it targets a female and goes nuts and strangles them. Not likely but I'm of the opinion we've got weirdness going on in spades and while guessing weird scenarios is usually impractical we should assume 'the obvious' options are probably not worht pursuing either.