Good question Norm, I think it has to be they got a 'hot' tip that made allot of other things they had learned fall into place. Time is of the essence then, and even tho they might have got this tip last week or days ago, they probably put the task force together as soon as they could. They knew a heat wave was coming but it was the last worry they had I think.
I also think the poster is right who said the FBI called in Pierce County's search force for fresh eyes and they have maybe had excellent results in sleuthing out notable points to solve cases. Believe me, I lived there, and the crime there is rampant. Roy is not far from Parkland where I went to college, and I would only go back there now for something very important. xox IMO