Columbia Mall Shooting: The Black Guy Did It.

This story is still unfolding, and it only gets eerier by the moment. This happened at a mall my family frequents, in a town just to the north of mine, and the deceased suspect grew up not far from my neighborhood. None of this adds up, it's all strange, it's all scary, and it's all going to happen again.

Darion Marcus Aguilar liked cooking shows. He wanted to be a chef. He liked to spend summer afternoons at the Martin Luther King Jr. Swim Center in Silver Spring. Harmless. That’s what his friends say. Unremarkable.

He has no criminal record that police or online court records can turn up. He’s had no contact with Maryland’s mental health system that authorities have found, law enforcement officials said.

But on Saturday, Aguilar, 19, who graduated from James Hubert Blake High School in Silver Spring in June, shot and killed two people and himself at a skateboarding and surfing clothing store at the Mall in Columbia.

Aguilar’s friends are trying to figure out what they missed or whether they should have seen the violence coming.

Police also are trying to figure out why Aguilar walked into the Zumiez store, pulled a shotgun and killed two employees: Brianna Benlolo, 21, and Tyler Johnson, 25. He then killed himself in the store, never going back out into the mall or threatening anyone else, even though he was laden with ammunition. Authorities said they have found no connection between Aguilar and the people he shot.

Howard County Police Chief William J. McMahon said at a news conference Sunday night that authorities had discovered a journal in a search of the College Park home Aguilar shared with his mother. McMahon said the teenager had written about his “general unhappiness” in life.

Aguilar’s parents, who do not appear to live together, declined to comment by hanging up or did not return calls. No one was at his house. Neighbors in Aguilar’s College Park community said they knew little to nothing about him or his living circumstances. On Sunday, after authorities released his name, reporters swarmed to his family’s white two-story home with green shutters, where a Christmas wreath still hangs on the front door and the welcome mat reads “Bless this Home.”

Police searched the home Saturday, and one official said they took the journal, computers and ammunition, among other items. McMahon said investigators are still going through the journal and computer files.

Aguilar had attended schools in Anne Arundel County before going to Blake. After high school, he was admitted to Montgomery College but did not attend.

I don't have much to add to this, but I'd like to know your comments and thoughts.

Question: What do you make of this? How can such incidents be prevented, when there are few, if any, warning signs?