This whole crime speaks of a killer(s) who engaged in extreme high risk behavior. Wearing such an outfit, presumably while driving, breaking the church windows, and shooting Missy ...imo this could be either a lone individual,or a team of people who are not exactly playing with a full deck. Wonder if their actual plan was to shoot as many of the exercise participants as they could ? But, something unexpected happened, maybe the killer was hurt ? And the original plan was abandoned. Maybe they lost their nerve ? If this is the case, I would think of late teens/early 20's, very alienated. Did ATF possibly think the church had been booby trapped, hence the dog ? This does not seem like a burglary, and after I thought more about it, it does not really seem like it was personal either. jmo,though