at first they thought this may have been a drill, the school had recently undergong training for these situations. >> we ran back inside to the classroom and got them down on the floor and then we moved into the closet. and we waited in the closet. >> that teacher went on to say that about 19 students were able to hide in the closet with her. they remained inside for about 40 minutes. >>> now we have been sending out push alerts be it the story all afternoon. download our free abc7 news app, and get the latest on breaking news as it happens. >>> there are calls for the resignation of judge aaron persky. she received a threat of an envelope with a white powder in it. >> reporter: tonight that section of the building behind me is back open for business, but earlier today a dramatic scene as investigators try to determine exactly what was inside that envelope. late this afternoon the all clear was given for students and faculty to resume normal activities at the stamford new come building. she says a white powder and what she says was a rape threat. a colleague was with her in the office.