This level of coordination speaks volumes to me. Think about it. It was planed out methodically. Probably 4 hit teams of two men, from out of state. (LE should look into nearby hotels) Perhaps 2 vans with waiting drivers. Might be disguised as traveling workers. The properties were cased out until they finally got the green light from the boss. All 4 houses were most likely hit at the same time, say 3:30 or 4Am (Weeknight) when they knew all 4 households would be asleep. Might of turned on cell-phone blockers at go-time. Rubber gloves, booties for shoes, the works. Approached from the woods. (Look for foot tracks in woods and pull-off spots for cars) Cut any power/phone lines. Enter and shoot at the same time. (Must of been very quite on break-in if victims were still all in bed. Also multiple gunmen for simultaneous executions, silenced weapons, the caliber will be telling.) Exit, return to the waiting cars and leave the state. 18 pieces of evidence? Probably the bullets and spent shell casings. My guess would be the Family was cutting into another dealers business. Either Pot or had started getting into pills or heroin. Pot seems small change for a execution of this magnitude but the size of their operation might of gotten too big. That or they refused to play ball with a larger syndicate. This whole thing might of been an example to other operations in the greater area. I am sure there are tons of them. So that they all fall in line. Cartels or Bikers. I bet they took all the family's cell-phones. Nothing else. Eventually LE might be able to determine who most likely orderd this through a communications trail. Phone, internet ect...But i Doubt they will ever be able to pin it down on the actual killers. These were hired pros. Probably out spending their earnings now in Mexico or somewhere far, far away, waiting for their next assignment.