I posted about this back when the article came out.
http://forums.pelicanparts.com/off-topic-discussions/972584-legal-guardianship.html
Basically these people find victims with large assets, move them to crappy nursing homes without the knowledge or consent of their families, and drain their assets by paying them selves large fees to serve as legal guardians. If someone happens not to die before their assets are drained, they are dumped on the state as indigents. It's apparently a regular cottage industry in Nevada.