Apparently LE used cell "GPS" data from David's phone to track his locations, which should give a play by play as to exactly where the phone was, went and for how long it was where ever it was. This would be much more accurate then cell tower pings. That must be why LE is giving specific times, such as when he arrived at the Hwy20/71 exit. Which would also mean LE should know exactly what time the phone started traveling north from that location and what time the phone arrived where the truck was found parked and how long it took for the truck to travel from the exit to where the truck was found. According to the press release no time was given as to when the phone started traveling north and a time suggesting the truck may have been there since 12:40 AM was given for when the truck arrived where it was found parked in the middle of the road.
Knowing the exact times when the truck left the exit and arrived where it was found parked, it would then be possible to determine the average speed at which the truck was driven between those two locations. I think that could determine if someone familiar with driving trucks was driving or not.
JMO
Description from NamUs:
David Schultz was scheduled to pick up a load of hogs from a site in Eagle Grove, Iowa in the evening on 11/20/2023. David was then scheduled to drop the hogs off at Wiechman Pig Company in Sac City. Schultz was seen on video camera in his semi truck on 11/20/2023 around 2330 hours at the Marker 126 gas station in Duncombe, IA just north off Highway 20.
Cell gps data indicates that David's phone travelled on Highway 20 to N14/Union Avenue in Sac County. David's phone continued north on N14 and the phone came to rest on N14 just north of D15/190th Street. David's semi truck containing his phone/wallet were located in the roadway in the northbound lane, which is the opposite direction of the hog site that David was scheduled to drop the pigs at.
The National Missing and Unidentified Persons System (NamUs)