May or may not be spoilers, but I just stumbled upon an Official Trailer that I had not seen before, it was released right before the show aired. It is filled with scenes from episodes that have not aired yet (as well as a few scenes I don't think are actually in the show), given what I know so far, some of it might be thought of as spoilers. It includes what could be considered a lineup of suspects, including people I never suspected (yet!). Probably just as interesting is who is not there.
If you still want to watch it, it is here.
Stream It Or Skip It: ‘Only Murders In The Buildin