KINGSTON — When Ellenville police Officer Antonio Bell kicked down the door of 9 Warren St. in Ellenville on July 23, 2016, he found Sarra Gilbert standing in a small kitchen, smoking a cigarette.Before Bell said anything, Gilbert spoke."I'm under arrest," she said.That's according to police body camera footage and testimony of Bell, who took the stand Wednesday on the second day of the murder trial of Gilbert in Ulster County Court.