there are nine of these scenes where officers have roped off the area. they are picking up bullet casing, trying to figure out the exact path of the bmw, but it appears to us, fredricka, that what he's done is zigzag his way up and down residential areas. it was 9:30 in the evening. a lot of students were preparing to leave their apartments or were already out in the street for a fun night out. it is memorial day weekend, and it is something that a lot of the students here say that they are simply shell shocked by. fredricka? >> and then, kyung, our investigators, are they saying anything more about things they are examining? like this written note that may have been from the gunman? or the video evidence? are they saying anything more about what they're learning from that? >> reporter: they are looking through a large amount of written material that's been posted on the web, as well as a number of video blogs and video posting s they're quite disturbing. they have not released the name