A woman who died Sunday after being found unresponsive in Lake Lanier has been identified as a Buford woman. Susan Button, 60, was with other family preparing for a day on the lake with their boat, according to Hall County Sheriff’s Office spokeswoman Nicole Bailes. “My understanding was that family members located her floating face-down near the boat dock” in an area off Lakeview Drive and Woodlake Drive in South Hall County, Bailes said.