Capt. Mark Vandroff US Navy on Fox was in bldg 197 conference room. Heard commotion about 8:00. Someone closed the lockable doors to their office area and then they barricaded themselves in behind conference room tables. Heard shots and saw bullet holes in the conference room walls. Stayed locked down trying to get to co-workers in the building via texts to ascertain their safety. Police officers took them out of bldg. about 10:00 or a little after.
An AR-15 look nothing like a shotgun. If shooter did have a shotgun, and many eye witnesses said he did, look for it to turn into an AR-15 very soon.