Sylvia Marie Likens (January 3, 1949 – October 26, 1965) was an American teenager who was tortured and murdered by her caregiver, Gertrude Baniszewski, many of Baniszewski's children, and several of their neighborhood friends. This abuse incrementally lasted for three months before Likens died from her extensive injuries and malnourishment on October 26, 1965, in Indianapolis, Indiana.