former fbi counterterrorism agent tim clemente. tim, let me start with you. as a former member of the fbi, we're also learning the fbi are on the scene. what would they be doing? >> it's possible the fbi s.w.a.t. team is assisting with the locals. i was s.w.a.t. team leader here in washington, d.c. for the fbi. and we routinely trained with all local law enforcement tactical teams in the case of an active shooter like this. and in the fbi, we would also possibly join in the investigation because of federal aspects that might be involved. the state murder is generally a state investigation. but anything above that could bring the fbi in for investigative assistance. >> all right. i just want to update you on the information we have. tim, as you were speaking, we now know according to the fire department, just telling cnn, there is a male and a female with life threatening injuries at this moment, and two men with more minor injuries. in terms of the four victims at this point that we are aware of.