There have been many highly publicized cases over the past few years where cell phone pings, texts, and phone calls have been key in tracking the movements of those involved in the case. Information regarding cell phone tracking is well known.
The fact that Dylan's cell phone was turned off Sunday night and did not go back on Monday morning is worrisome to me.
Yes, kid's cell phones run out of charge but you usually don't see those same kids end up missing.
Additionally, I home PPD tried to get DNA from the blanket Dylan's father said was used when Dylan slept on the couch and fingerprints from that bowl of cereal his father said was left.