I wonder if he's explained his 410 steps out of the car at 11:16am, exactly 10 mins after picking up BW. 10 mins would be long enough to drive from Dukesmead, up Werrington Parkway to Glinton Esso roundabout, and then down the A15 to Car Dyke/ Barn garden centre.
11:23am his phone disconnects
as he's driving - "Cell site technology was able to say
his phone had been travelling east when it was switched off. ...Scott Walker deliberately
switched off his phone as he drove out to those fields out of Peterborough." (
source)
"He said he had taken the ‘scenic route’ from her grandparents as he was heading home, driving down the A15 and stopping to see horses before heading back up the A15 and onto Skaters Way." (
source)
I think the cell site technology rules out that he killed her in a field near the Barn and left her body there. It would take longer than 7 minutes to walk 410 steps, kill her and get her body back in the car, well enough concealed to drive off. Plus you can't drive eastwards from Car Dyke/the garden centre.
So, he's driving for 10 mins so can't have killed her before 11:16am. Then he gets out and walks - he has 7 minutes to walk 410 steps, unlikely he's killed her while he's walking. So 205 steps out of the car and 205 steps back to the car. How long does 410 steps take? 3-4 minutes if he's walking with purpose, or 7 minutes if he's just pacing in a small area, having a cigarette? So let's say he was walking until 11:19/11.20. (looking at horses!) Then he's got 3-4 minutes to kill her, get her in the car and drive off. Or drive off with her alive and kill her somewhere else after his phone is disconnected, which sounds like the more likely scenario to me. If he killed her when he got back in the car, strangling or smothering is not a quick way to kill someone and I don't think he'd have been driving off so quickly. Plus we're to believe there's no evidence she was killed in the car.
Where could he drive east from the A15? Manor Drive if he'd stopped by the garden centre, which would connect with Newborough Rd, and then either north towards Newborough or south to the A47. He's back in Gunthorpe calling Sarah 1.5 hrs later, so he didn't go that far to include killing her and concealing the body.
It seems very purposeful, he seems to have been conscious of the fact he needed to get back to Gunthorpe to claim the run away happened there as soon as possible, and not so long after leaving the grandparents that police would say well you were off grid for most of the day, that doesn't compute with going from Dukesmead to Century Square, even with the excuse of a McD's. I don't think he's been lucky and found a spot to kill her by chance, knowing the time constraints he was under, so I think he had a place in mind he knew well, not only for parking, and also killing unseen, but being able to leave her body too without it being discovered by walkers before he could get back and bury her. If he'd dumped her in water in a remote spot so that her body wouldn't drift away, he wouldn't have gone back next morning IMO.
The A47 fits with his trip with Sarah in the period when their phones were disconnected on the night trip of 20th. I think she has to be located in a wooded area, not used by Saturday walkers but accessible by car, where he can bury her without having to move her again in the car, where she won't be discovered by land excavation.
Each trip is roughly the same amount of time - Saturday 1.5 hrs (including killing and concealing IMO), the 19th early hours is 2hrs 17 mins but he might need to be digging during that trip so I'd assume digging would take about an hour, the 20th early hours unexplained activity is 1hr 15mins. I think we're talking about a distance of about 20-25 mins out. Maybe around Thorney.
