How can,I get a current free address on my half sister sabrina mae townsley?

Sabrina mae townsley was last known to live at 804 silver crest lane vabeach, va in 1992. She has blonde hair and hazel or brownish eyesand was a child at the time. She was born on 09/30/1986 in portsmouth va to charlene ann townsley and birth father and mother was not married at the time, however his name was david lewis dunn born on 02/24/1958 in jacksonville fl.