A 62-year-old dementia patient who wandered away from his Lancaster home was found unharmed, authorities said this week. Donald Bruce Harris left his residence in the 2300 block of Avenida del Mar on an electric scooter about 9:30 a.m. Monday, said Deputy Kimberly Alexander of the Sheriff’s Information Bureau. Deputies sought public help to find him, and circulated his photo. Authorities said Harris was found later that same day, and his family was notified