Murn and the man pretending to be Captain Locke met in Murn's motel room when he accepted the assignment. I don't know of any reason why the Queen Butterfly wouldn't target Peacemaker and his crew since in less than one week, Peacemaker has almost killed the Queen Butterfly (at least 3 times, 4 times if Eagley could have figured out a way to open that damn bottle), destroyed their food source distribution, killed dozens of Butterflies, killed the Gorilla Butterfly, knows the names and location of all of the Butterflies on Planet Earth, destroyed whatever plan the Butterflies had for Earth, made all the Butterflies leave all the host bodies they were in and come to where Peacemaker lives and Peacemaker is close to killing the source of their food supply.
I wonder if the host bodies die when the Butterflies leave them. You would have thought that would be a major news story on the TV if several dozen prominent people from all around the world, all died at the exact same time.