Thanks for the answer, but under the circumstances that doesn't sound inappropriate. Maybe one night before she was injured, she watched a movie or something with him about a person in a similar state and asked him in tears to promise he would never let her end up that way, but to end her life if she was unable to take care of herself. It sounds like he's fulfilling a promise to the woman he loved. He's her husband. The decision lies with him. As I said though, I'm not super familiar with the situation. Can you expound on this for clarification?
hearsay, regardless from whom, should NEVER be sufficient to deprive someone of life.