Mysterious black brief case leads to Scotts Bluff County Courthouse evacuation; previously there had been turmoil within the Scotts Bluff County Attorney's Office Omaha. com A black briefcase delivered to the County Attorney's Office prompted an evacuation of the Scotts Bluff County Courthouse.Interim County Attorney Doug Warner said the briefcase, wrapped in packing tape and labeled with the return address "UR TOOK, Nothing Street, Billings, Montana," was delivered Thursday morning with the mail. Scottsbluff Police Detective Bob Rader said officers X-rayed the package and then opened it, determining that it did not contain dangerous materials. The briefcase contained paperwork, he said. Sheriff Jim Lawson said the safety of courthouse employees and the public was the primary concern. "While it (an evacuation) may be an inconvenience, it is always better to err on the side of safety," he said. Lawson said investigators would seek to determine who sent the package and whether charges would be filed. Last month, the preceding SB County Attorney resigned citing West Nile sickness and th eoffice had fired and then immediately rehired an assistant prosecuting attonrey