interesting way. i don't think we have seen that before. or immediately putting out an appeal for students or teachers who were taking videos or any kind of instagram video to send it to police. so they can piece together a video documentation of what went on. >> that's not the only reason. the first question i think we're already almost to the end of are solving this. when you see the video do you see anything he suggests he came in with another accomplice. my question is not the tragedy of 17 people killed. but let's ensure there wasn't anything else going on. coordination with another student that suggests there's a follow on incident. you have the question of evidence. if this person goes to trial. do you have evidence as you suggest iphone video for example. that will help. lessons learned. do you have video that suggests to us ways we could have handled this better. i think the bigger question is in the age of digital media,