Richard Sumner, a 47-year-old artist decided to commit suicide in a really distressing way. He handcuffed himself to a tree and threw away the key. His body wasn't found until 3 years later, when a woman was looking for her dog. 

The man had suffered schizophrenia for years, and he had attempted to commit suicide in the same way years before he actually succeeded. Investigators said that there were signs that the man had changed his mind, but wasn't successful in reaching the keys.