what do I need to do to have the legal authority to make decisions for an elderly relative who no longer has any food in his home, doesn't bath because he is too weak, has fallen at home 3-4 times this last year, has his cable bill automatically deducted from his acct, even though the cable hasn't worked in months, and when the company at my request went to his home to check the cable, he said nothing was wrong, and told me he forgot why they came. His mobility is becoming more impaired, might eat a hamburger every other day, hasn't bathed or showered in months, to possibly a year. We have asked the police to go to the house, when he has forgot to hang up the phone for 4 or 5 days. He has no outside contact, no friends, and in case of emergency, no one goes to the home except for every other wednesday to do odd household chores. How can I legally intervene on his behalf, and be allowed to move him to an assisted living center, possibly against his will??

what do I need to do to have the legal authority to make decisions for an elderly relative who no longer has any food in his home, doesn't bath because he is too weak, has fallen at home 3-4 times this last year, has his cable bill automatically deducted from his acct, even though the cable hasn't worked in months, and when the company at my request went to his home to check the cable, he said nothing was wrong, and told me he forgot why they came. His mobility is becoming more impaired, might eat a hamburger every other day, hasn't bathed or showered in months, to possibly a year. We have asked the police to go to the house, when he has forgot to hang up the phone for 4 or 5 days. He has no outside contact, no friends, and in case of emergency, no one goes to the home except for every other wednesday to do odd household chores. How can I legally intervene on his behalf, and be allowed to move him to an assisted living center, possibly against his will??