>> d.c. police chief kathy linnear said there is no question alexis would have killed more people if they hadn't taken him down after multiple shootouts with officers who responded within minutes. >> within seven minutes we had active shooter teams inside the building, moving through the building. there were multiple engagements with the suspect that was eventually deceased. metro and park police, preliminary information got into a final gun battle with the suspect that's deceased. >> police won't confirm the type of weapon used, won't say the number of rounds fired or rounds that alexis may have had on him after the shooting when he was taken down. we know the fbi evidence response team is on the scene, carefully documenting every inch of the crime scene. but, again, there is no official confirmation that there is no search ongoing for a second suspect. the last report was they were