DEER PARK - Police say a man is accused of neglecting his elderly mother who suffers from Alzheimer's disease and was found living in wretched conditions.Suffolk officials say Joseph Coppa, 57, had signed an agreement with the county to get 24-hour home care for his 95-year-old mother. Instead, officials found her living alone in her filth-ridden West 5th Street home.The woman was found wandering near her home back on April 16 and was hospitalized. Coppa assured authorities he would seek care for his mother at the time, but a check by a social worker one week later found the woman by herself. An investigation found that Coppa never sought care for her, officials say.Coppa, who lives in Brooklyn, was arrested and charged with endangering the welfare of an incompetent or disabled person. The woman's home was condemned by the Suffolk County fire marshal.