The police said they have "no suspects in custody", just some individuals they are interviewing. It looks like they are evacuating + raiding a building where they think he might be.
All three victims are in "critical but stable" condition.
He said they have a social media video that they haven't been able to authenticate, probably this vid.>>374179769
Someone posted a video here of shooting random people ~2 hours ago. It looked like he was shooting from some vantage point through a window to a hallway of a DC prep school where students were walking. Then he started shooting at this guy on the street: >>374183624
, then shooting the window again
It sounded like a semi auto AR15 maybe, very loud and echoey, just pulling the trigger very fast