Someone kills you and you transmigrate?

Nope, it's like Lich.

If you really want suspect you can always just put up vitae instead of transmigrate once.

what if someone kills you, and you vitae, then they kill you again? do you get Avenger status?

Yes, you get vengeance.

Don't they get vengeance twice? Once for attacking while having suspect, the second time from actually dieing?

Quite correct.

Of course, you can now use vitae to dodge Avenger (and it isn't a bug!).

I absolutely loathe double vengeance. Even if I have killed someone before, doing one aggressive action isn't worth a vengeance. Killing him again, sure, but just looking at him in the wrong way gets Avechna on your ass.

Too complicated for my mind to understand.

If someone kills you on Prime without you hitting them, they become a suspect. You gain vengeance the next time they hit you while still suspect. And if they KILL you again, you gain vegeance a second time.

Not *quite* right.

If you kill someone you DECLAREd on, you get suspect unless they die in an area that they're enemied to. Even if they hit you back.