Psychologists all over the world will tell you that worst thing you can do in situations like this is give lime light, or any attention at all, to the attackers in this situation. Mainstream media, and politicians looking to score points do it all the time, and all it does is give potential attackers another incentive to carry out similar atrocities. Remember Columbine? The media were all over the two gun men. Everything was about them. What they listened to, what they watched, what they played, how they dressed. If you think this doesn't feed into the narcissism of others contemplating such attacks, you're spectacularly naive. Concentrate on the good, on those who helped, on sacrifices made, and what can be done in the future, don't aggrandize murderous c***.
Remember the dead and injured , ignore the perpetrators!