The NY Times takes a look at the symbology of the pins the shooter adorned himself, which leads to questions about the possible motives behind the shooting:

Dimitrios Pagourtzis, the 17-year-old suspected of killing 10 people at a Texas high school, wore clothes that featured several symbolic pins. Here’s what they mean.

The Wall Street Journal Reports The Shooter Picked Certain People To Live To Tell The Story: 

The 17-year-old suspected of killing 10 people and wounding 10 others after opening fire on a high-school art class told police he spared students he liked during the rampage, according to court documents released late Friday.

The suspect, Dimitrios Pagourtzis, a former high-school football player who is in custody, admitted to police following his arrest that he had shot multiple students at the school, intending to kill them, but wanted other students to survive “so he could have his story told,” a probable-cause...