What would a full-baked kidnapping charge look like?
Let's say Heather was contacted from a phone number she did not recognize and because that number was not blocked and she didn't know who was calling, she picked up. She's kind of naive (maybe just a dumb kid). She's encouraged to come out. She was more than willing to see SM so heck, why not. She thought whatever he told her about why he was calling her at 1:35am was the truth and she trusted him.
Let's say SM really wasn't going to leave his wife but maybe Heather thought he was. So that's a false pretense. SM picks her up in the truck and is able to get her to turn off her phone (or he takes the phone and turns it off). Either way... we know the phone is off, never to ping to a tower again. At that point is Heather trapped? Was she in a trap but just didn't know it yet? Is anyone else in the truck or just the 2 of them? She must have gotten in willingly, yes? If no, then it was by force. Kidnapping, right?
So she's in the truck willingly and then something happens to Heather. Something that made the M's feel it was time to get rid of the security DVR in their home that would have been able to capture something happening that very night. And 2 (or 3) days after that rendezvous they replaced the older DVR that was in existence on Dec 18 2013 with a new DVR. Moved the monitor, put up a picture on the wall... it's a different system.
And for some reason that new black truck, a truck that has the technical capability of showing exactly where it went on its journeys, manages to (oops) not have any data to show where it was traveling that Dec 18 2013.
Of course this is all very innocent. New security systems are no big deal and SYNC modules on trucks...pffft. Whatever. Can't read anything into that!
So Heather has disappeared. No one intended anything in advance. It was all very innocent... until.... someone made the decision to harm Heather. Heather was not protected. Heather ended up in a trap, a trap where harm befell her. It was only a few minutes...nay... maybe only mere seconds that someone made a decision that ensured Heather would never be seen or heard from again.
And yet... a decision was made at some point. Heather was not free to leave and was not returned safely back to where she was picked up.
*** do not forget that the geolocation data settings that had been turned on for photographs on SM's IPhone was turned off on 12/11/2013, before returning to Horry County from a trip to CA., although, I guess that does not fit into this scenario....