the player they killed was running all offense and using DR to post big gains without being subject to retal, which has been a pretty big problem in Express. So all players have a motive to kill him. In fact, Warster said he would be deleted if he had joined GDI, but since he didn't, it was up to the players to do something about it.

but really, people join to kill people a lot on Express and don't get deleted.