I don't know when the phone stopped connecting with the cell tower, but you explained the other day to me how you came to that conclusion, and I appreciate that, and respect your opinion.
I think Dylan, having been up until 4am Sunday morning, and traveled all afternoon, may well have been tired and fallen asleep. Or he might also have stayed up watching TV.
In either case, and in the morning, it's certainly feasible to me that Dylan simply didn't return any more texts or initiate any texts. I came to the conclusion
(based on Elaine's statements (NG 12/3 & Blasius), as well as on her behavior (not being surprised or upset or concerned and not taking any action to determine if something was wrong when Dylan didn't return her text Sunday night and she apparently just went to bed and didn't try to contact Dylan, and the same when Dylan didn't return her text she sent Monday morning she wasn't surprised or upset or concerned but apparently just went on to work and didn't try to contact Dylan all day), and the behavior of Dylan's friend R who wasn't upset or concerned until late afternoon when MR showed up and simply sent a where are you text at 6:46am and a come to nando's text at about 10am and didn't contact ER))
that it was not unusual or uncommon but well within Dylan's norm not to text or text back to people.
It's very feasible therefore that Dylan may have in the morning, as Bender said, left the house and been abducted, or as Bender also said, something may have happened at the house, that being someone came to the house and abducted Dylan. Perhaps planned, perhaps unplanned - non-family abductors are frequently known in some way to the child or the child to them. Sexual predator non-family abductors are frequently opportunists, not planning, but seeing an opportunity to abduct, take advantage of the situation.
Bender's statement -
"He either left the house and someone abducted him or something happened while he was still at the house. I could not think of a 3rd possibility," said Dan Bender, spokesman from the La Plata County Sheriff's Office.
Info on non-family abductions - Nonfamily Abducted Children:
National Estimates and Characteristics -
http://www.missingkids.com/en_US/documents/nismart2_nonfamily.pdf
Info on family abductions -
http://www.missingkids.com/en_US/publications/NC75.pdf
Info on family abductions, non-family abductions, stereotypical kidnappings, runaways, thrownaways, lost, injured, otherwise missing, attempted abductions, child homicide, and more from NCMEC -
http://www.missingkids.com/en_US/documents/TTT_Presentation.pdf