With the current information given was murder one of the primary motives: • The crime was well planned out for over a month • The house had been targeted and visited on multiple occasions • They had an over-abundance of man-power and weapons Given the above, they could have easily monitored the house and arrived when the parents weren’t home so why break-in when they are home and with all of this fire-power? Even, if there was some resistance they could have easily over-come this couple and tied them up, especially with karate kid on the scene. It seems murder would have had to be one of the primary motives from the beginning. Maybe, not to all of them but at least to the ring-leaders. Of course, they also wanted the money, documents or anything else that they could grab .... but they were out for blood.