BROOKHAVEN >> At 85, Betty Kelley spends most of her Friday and Saturday nights listening to the radio.It's not Frank Sinatra or big band tunes that have her ear; it's her town watch radio that she keeps next to her as she patrols the streets of Brookhaven."It's what keeps me going," she said during an interview at the home at the Creekside Development off of Brookhaven Road.