I have a few thoughts on JS and what MIGHT have been going on in his life last June and, based on this, what may have transpired on that day.
He was a street kid in the Dominican Republic before being adopted age 7 by a Lancaster couple. His adopted father describes him as always being trouble.
He ended up doing well at wrestling at High School but after that turned to crime involving his younger sibling and spent almost all of his adult life in prison.
When released in Feb 2019, he would have been 33/34 and a convicted felon. Any friends he knew from before may have moved on and perhaps had families and didn't want to know someone who'd been in prison for the last (approx) 12 years.
Had he ever had a relationship before prison? He probably wasn't exactly the most eligible bachelor after release back in a small town where his history would be well known.
Had he always been shunned by girls since he came to Lancaster County from the streets of a Caribbean Island with likely little or no spoken English or formal education at the time?
Did he begin stalking young Amish girls because of their innocence and naivety? Much easier to snatch into his car than older and more streetwise women?
Drinking liquor whilst driving around stalking suggests he was somewhat depressed and/or needed some Dutch courage to follow through with what he had planned.
It's reasonable to assume that he may have planned to violate whoever he was able to bundle into his car. The purchase of gloves seems to indicate plans to eliminate the chance of being identified by his victim.
Was he heading to the Welsh Mountain? The last sighting at Peters Road places him 10 minutes away at approximately 1:30 yet his cell phone pings show he was at the Harvest Drive address just one hour later from 2:30 - 3:30 and a witness saw him sanitizing his car shortly after at home.
I think he may have become agitated at how many people were noticing him with LS. The liquor may have started to wear off and he began to panic.
Were the texts he sent a clumsy way of trying to show he was doing other things if he were investigated? In a similar way to posting vacuously on Facebook that he was washing his car. Or was he texting/calling to share the fact that he'd abducted a girl, people were noticing and the girl herself will identify him if allowed. Was he desperately asking for help with what to do?
Had he continued another 10 mins to the Welsh Mountain then he would be another 25 minutes from Harvest Drive if he decided/was advised on a change of plan. Either way, it doesn't seem that there was enough available time for the crime that harmed LS to be before arriving at at Harvest Drive.
Was he told to meet someone there? A person who would help him cover up his awful crimes?
Did JS know this location or, if he had a helper, was it an address that this person was familiar with?
The available facts and timeline seem to point towards this being a possibility.