Thank you!
Given that LEK managed to pull all of this off and not getting caught until she basically decided to (keeping a box with all these documents at her house surely must've been a way of making sure that word got out after she was gone?) she must be quite smart. She seemed to have difficulties with people and socializing in general. This makes me think she had a disorder (is that the right term? English isn't my native language) of some kind (not the ADHD and Tourettes she was medicated for). I first thought of Asperger but people with Asperger are notoriously honest - something which LEK clearly wasn't. Anyone got any idea?
Furthermore, based on the fact that she spread out all over the westcoast, she obviously didn't want to be traced. She had a mail box in Nevada, lived in Texas, had something going on in California (based on the scribbles she made + the birth certificate of BST), had an ID card issued in Idaho, had some connection to Washington (did she actually go there? Or are we just assuming she did? I can't remember.) and some connection to Arizona as well (was that where she got her SSN?). I am thinking that none of these states are states which she originates from, but are near where she comes from, possibly to make her difficult to track.
Utah is close by and have a lot of mormons living there... Could she have been a run away? Other possibilites are Oregon and Montana. Being a runaway doesn't justify going through such trouble of changing her identity, though... I don't have a lot of knowledge about mormons or other religious movements, but I'd guess that they simply wouldn't care if you took off and left?