At Rally, Victim’s Sister Warns: ‘Dart Will Kill Again’ His Juvenile Conviction Sealed, His First Victim Tells Her Story Jennifer Kirkpatrick, sister of Gillian Gibbons, asked 50 supporters gathered at the “Justice For Gillian” rally in Muller Plaza this afternoon to send letters asking the state Parole Board to deny convicted murderer David Dart parole in the stabbing death of Gibbons, 18, in Oneonta’s Municipal Parking Garage 30 years ago. “If he gets out, he will rape, he will kill…