This is a sad story.
I am not sure if the husband should face charges.
I have worked with a lot of senior citizens. Most often they only ask for help when it is too late or someone else intervenes. They have been taking care of themselves for so long that they often don't recognise the need for help.
http://foxnews.com/story/0,2933,490857,00.html
This man stated his wife did not want outside help. He stated that he expected her to get up in her own time. He continued to feed her, clean her and give her her medications. It sounds as if they were both in denile. My heart goes out to them.