Tony aiell o is live on the scene at soho. The gunman apparently harbored a grudge against the federal government, sparking a Massive Police response to the Federal Building at varick and west houseton. Reporter a federal Security Officer who witnessed the killing of a colleague was escorted past the crime scene after the shocking end to a summer workweek. It happened just inside of this entrance on west houseton. The nypd says 68yearold Kevin Downing entered the building with several guns hidden in a bag, and he shot and killed idrssa camara and then shot and killed himself. Reporter he was fired several years ago. We are at the early stages of this investigation and are working to establish his motive for coming here , if he had a motive beyond the Security Guard and everything else. Camara was scheduled to complete his day at 4 00, but he agreed to stay on. Landlords in the nearby buildings warned of possible danger. We were told to say in the building. It was scary. It was terrifyi