School Supt. Freeman Burr said the bomb threat involving Shelton High School on Thursday afternoon was left in a voice-mail message on his administrative assistant\u2019s phone line at the central office of the Shelton Public Schools. The call with the message came in at about 1:20 p.m., and was immediately forwarded to him. It was a male voice and \u201csounded like someone disguising their voice,\u201d Burr said. The message involved a specific location on the campus grounds and kind of device, which enabled police to quickly check out its validity. Police rushed to the scene Burr immediately contacted the Shelton police, who rushed to the scene with fire officials. A decision was made not to evacuate the facility because the school was about to dismiss, checking the location of the specific threat only took a few minutes, and students and staff may have been asked to stay inside the building anyway due to the threat location. \u201cWe would have maintained shelter in place much longer if it appeared more valid,\u201d Burr said. \u2018Details didn\u2019t fit\u2019 Burr said there are other reasons why the threat appeared to be fake besides the caller apparently trying to disguise his voice. \u201cSome of the details didn\u2019t fit,\u201d he said. He said it was decided not to send out a message to parents at the time because the validity of the threat was checked out so quickly and there was limited information to disseminate before the situation was resolved. \u201cWe didn\u2019t think the threat was valid but we did have to investigate,\u201d he said. \u201cThen we quickly knew it was not valid.\u201d School SRO assisted at scene After the message was received, Burr said Shelton High administrators were able to work closely with the school resource officer (police officer) at the scene. The superintendent said \u201ccrank threats\u201d involving the schools are received from time to time.