Well, it's been 4 days. The fact that not a single news agency has managed to publish the identity of the bomber means one of two things:
1. The bomber was a rich white kid and the protection of his identity by the police and community (including all his/her fellow students, who undoubtedly know who he/she is...circumventing police efforts to hide the identity of a minor) is due to a huge white privilege conspiracy that might very well involve magic underwear and the media just hasn't learned it despite resolute efforts to that end.
2. The media has the bomber's name, but he/she has more than one relative named Muhammed and continuing to cover this story and/or divulge the bomber's name would derail the vastly more progressively satisfying gun banning efforts.