Not near as much fun as gunning a guy down in a fire fight, but they could have just dive tackled him and cuffed and stuffed him at any of the numerous face to face meeting that were held between LaVoy and the authorities over the prior few weeks.
Still, LaVoy did have some responsibility here. Can't get past it.
Years ago, Waco incident. The sheriff there reported David Koresh often coming into town to gather supplies and so forth. The feds could have nabbed him with incident at that time. Nope. Oh, those boyz with their toyz had to perform and all out assault on the compound. Resulting in the murders of innocent woman and children.