Elvis' final years have been the subject of a cottage industry of celebrity bios, tell-alls, and gossip screeds from those who knew him well, or (more likely) purported to know him well. Those activities are really beyond the scope of a mini-bio such as this, but it's enough to note that his behavior was becoming increasingly instable. His weight fluctuated wildly; his marriage broke up; he became dependent upon a variety of prescription drugs. Worst of all, he became isolated from the outside world except for professional purposes (he continued to tour until the end), rarely venturing outside of his Graceland mansion in Memphis. Colonel Parker's financial decisions on behalf of his client have also come in for much criticism.