Interesting what Sarah said about the truck and where she had David's mechanic park the truck after being moved from where the truck was found. Apparently David parked the truck at his mechanics shop, which was just a few blocks from their house. There was speculation that David may have had to drive a distance to get to the truck before starting his route to Eagle Grove. I would imagine David used a personal vehicle to drive back and forth between his mechanics shop where he parked the truck and his house, so little to no travel time between home and truck.
Also Sarah describes how the truck was apparently not processed for evidence when the truck was found parked on the road and it wasn't until four days later that LE took the truck to maybe do so. By that time numerous people had been in and out of the truck and at least two people had driven the truck contaminating any evidence such as DNA that would have maybe been on left behind if someone other than David drove the truck to where it was found.
Video should start shortly before this portion of the interview and lasts a minute or so.