Yes, they could have used the excuse of needing to relieve themselves, and pull over into the lane, or maybe it was just MS, who did not want to be inside the cab when shots were fired, so as soon as he got out, DM shot Tim. When they pulled in that lane, I wonder too if Tim might have seen the Yukon parked there, so DM would shoot him very quickly before he could even ask what that truck might be doing there. The dogwalker only saw the truck and Yukon driving out. They could have been sitting there for a few moments, and maybe he did not hear a shot because he was in his house, or out of the range for hearing it. Le seems sure Tim was shot very soon after leaving his home. Did they find shattered window glass from the front passenger window of his truck in the grass near the tire tracks ? If so, this is where he was shot. One can only hope it happened so fast Tim did not see it coming, or that he had already been knocked out by MS.