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The teenager accused of killing 17 people at a Florida high school had alarmed authorities, neighbors and classmates, who recounted such behavior as obsessing over weapons, shooting small animals with a pellet gun and harassing neighbors’ pets. (Kamp, Calvert, Campo-Flores and de Avila, 2/15)

Despite the fact that [Cruz] was well known to local police, school and mental health officials, he legally purchased the AR-15 that he used to gun down his former classmates. Cruz slipped through the gaps in a dysfunctional mental health system and a gun background check setup not designed to stop mentally ill people who haven’t been incarcerated or court-ordered into treatment. (Emma, Ehley and Ducassi, 2/15)

After horrific events like shootings or attacks by terrorists, parents are faced with this dilemma: What do I tell my kids? How can I talk to them about something so senseless and indiscriminate? About something that we can't make sense of ourselves? "It's important to explain to children the rarity of these events," said Dr. Gail Saltz, who has been in private practice as a psychiatrist for more than 20 years and serves as a clinical associate professor of psychiatry at the New York Presbyterian Hospital/Weill-Cornell School of Medicine. (Wallace, 2/15)

While there are few polls detailing young people’s views on gun violence, the limited data suggest a nuanced view that includes support for some toughening of regulations. In a 2013 survey of 941 high school students across the country conducted by Hamilton College of Clinton, N.Y., a large majority of students, 85 percent, supported stricter laws on background checks for gun purchases. (Tucker, 2/15)

The National Association of School Psychologists is holding its annual meeting in Chicago this week, an event given new urgency by shootings at a Florida school on Wednesday that left at least 17 people dead. On Thursday, it released guidance on how the media should cover the shootings, warning of the “dangers of intrusive or excessive coverage.” (Strauss, 2/15)