Ok, Chill this is what I am thinking if we do NOT test/vial the same person.
I really feel John or Sploke is evil, and I believe more then likely Bally is with the one that is. My gut is really saying John, but I could definitely be wrong.
I am thinking it may be a good idea to test Bally, vial Sploke or John and invest the other. Now, the evils do get a hit and I'm sure I will be the one taken...if the lab worker is innocent (which they are suppose to be) they would NOT go and us the vial on You, myself or 2H so after nightfall we would all (whoever is not killed) still be confirmed innocent, the other Bio can tell the invest results.
I also feel Pir was brought back evil, I still do not see how he could of used a vial