Nevada workplace safety officials are investigating a complaint alleging that Assemblyman Steven Brooks, recently arrested for allegedly threatening Assembly Speaker Marilyn Kirkpatrick, is "an unstable and dangerous employee" at the state Legislature. Chris Davis of the Nevada Occupational Safety and Health Administration, which has the authority to investigate workplace-safety complaints and take action against employers, notified Legislative Counsel Bureau Director Rick Combs of the complaint in a Feb. 4 letter asking for a report on how LCB is handling the situation involving Brooks, D-North Las Vegas. Combs responded to the letter on Monday, saying the LCB and Legislative Police have …