IMO, I'm just finding everything surround MC extremely strange. First he was KH's childhood friend who TH did not meet until after Kyron disappeared. Then MC and TH alledgedly had an "inappropriate" relationship AFTER KH left. MC now is volunteering all this "information" to LE and KH against TH.
IMO, you are correct. There is nothing illegal about sexting or any of the alledged "paper" trail for TH's strange behavior. So how did LE get a warrant to have access to MC's phone or any of the other things?
IMO, TH seemed to cover her tracks to the point that Kyron has not been found and no "credible" evidence regarding locating Kyron has been found. However, after KH left TH seems to be leaving a paper trail all over the place.
IMO, I am starting to question if TH thought to change her passwords, internet provider and/or cell phone provider.