What I got out of the Disappeared episode.
Katelin graduated early.
NONE of Katelin's clothes, her phone nor her prized diploma were found with her suitcase. Her wallet, debit cards, toothbrush, phone charger, etc were with the suitcase. The suitcase appeared to have been 'thrown' from a vehicle, it had a broken wheel.
LE did a search by FLEAR(?sp) and went 30 miles downstream searching for her clothes, not one item was ever found.
She visited old friends from high school, a couple, they drank, they invited her to sleep it off at their apartment, things happened, took her back to her mom's house the next morning, LE interviewed them several times, feels they are telling the truth. NO mention of rape or coercion.
According to the male friend, Katelin was despondent over what had happened.
Amber supposedly received a text from Katelin that day that said she wasn't returning because she cheated. (IIRC that is not what came across by Amber's mom)
Step dad said he dropped Katelin off about 1 pm at the JC Penney Store Springfield Mall, LE states there is 2 cameras there, neither Katelin, the step dad nor the Jeep were ever spotted.
LE also requested video from the Metro and other mall cameras.
Step dad sent the text to Katelin's mom at 1:52 pm that he had dropped her off.
Katelin's mom (Lisa) knew Heather in passing only (from each's work).
About 7:15 pm, Lisa received a text from Katelin's phone that she needed time and was with a friend.
At 2:00 pm Lisa receives a text [I'm at the airport. Battery dying so won't be able to text for a bit] THIS by her phone records was when the phone pinged 50 miles away, within 5 miles of where her luggage was found.
Further surprised that the step dad's phone (all his devices) showed he never left his home. And they called his employer, he did NOT go in to work, he had called off. He also never tried to call Katelin after she was 'missing'.
Step dad was cooperative until time for the LDT, when he advised his attorney said no, after that he will not talk with LE. Lisa asked him about it, he told her he had said what he had to say and doesn't have to repeat himself.
LE received a SW and spent 8+ hours searching the house, grounds, swampland and forensic exam of the vehicles. Nothing was found.
LE has not come out and said step dad is POI, just that they know he knows more than he is telling.
LE has the door open for the step dad to come in anytime and give further info, if he helped her 'disappear', if he knows who is hiding her.
LE was able to tell that Katelin was communicating with someone VIA encrypted text/messenger, LE can not get those texts.
Lisa does not feel she is just missing, she feels she would have at least let someone know she was 'ok'.
Katelin's sister feels Katelin possibly met someone online, Katelin went with this person and it didn't end well.
Sorry so out of context. I was doing part by memory and then I rewound the recording.
IMOO, Katelin did not disappear herself. Step dad did. Katelin will be found in that '5' mile radius between his home and the luggage.