The Gwinnett County District Attorney’s office has given notice of intent to increase the punishment in the slaying of a Gainesville woman. Peggie Robinson, 61, was stabbed to death in Dacula by 35-year-old Wolf Griffin, according to investigators with the Gwinnett County Police Department. Police said they believe she was facilitating the custody exchange of a child between Griffin, the 6-year-old boy’s father, and her son’s ex-girlfriend, when she encountered Griffin on the afternoon of Dec. 28 at 2995 Evergreen Eve Crossing, Griffin’s residence in Dacula.