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On the night she went missing, Carringers mobile phone pinged a cell tower in Union County around 11:30 p.m., providing information investigators and ultimately, Richard Cornwell used to pinpoint her remains.
Working with the GBI and using every lead they gave him, Richard Cornwell searched in every spare moment, using a meticulous system.
"He had a set process where he had to walk every foot of the area he was looking in," GBI spokesman John Bankhead said Monday. "He walked every square foot of an area."
Saturday, that area was the two square miles that cell tower data had identified as the site where Carringer was the night Kristi Cornwell disappeared, Bankhead said.
Richard Cornwell learned about the location a week before he found his sister's remains, but weeks before the GBI planned to canvas that area, GBI officials said. There, about 75 yards from Moccasin Creek Road, just south of the North Carolina border, Richard Cornwell found the partially covered, burned skeleton, authorities said.
http://www.ajc.com/news/brother-finds-cornwells-remains-794176.html