<human>: My aunt suffers from extreme Asperger's and, after having a mental breakdown 10 years ago, severed ties with everyone. My dad hires a PI every year to track her down and let her know that we want to see her again (she loved my little brother and me more than anyone in the world).  The PIs have been successful a few times, but when they find her she refuses to make contact and moves again. Unfortunately, the last time she was heard from was 5 years ago. Due to her deteriorating mental health and poor diet, we fear that she could be dead or institutionalized. However, we can't track her down because she lives almost entirely off the grid (no credit cards, cell phones, etc). I'm about to graduate from high school, and she was my favorite aunt. I'd love to try to reach out to her (if she's alive), because I feel like she would respond to my brother and me better than other family members. I know there's a good possibility that she's not alive, but, as terrible as it sounds, that would bring a lot of relief to my family. We fear she might be homeless or hospitalized, and knowing if she's living or not would bring us a lot of closure.

Condense the text into a few key points
<bot>: Aunt has severe Aspergers and cut off contact from family 10 years ago, PIs haven't found her since 2006, how can I find her?