A motherhood moment I just wasn't prepared for

When Paul dropped Fuller off at school yesterday things seemed a little odd. They weren't letting the students in the building like they normally do, they were having them wait outside. I found out when I picked him up that afternoon that the teachers were in a special meeting that morning, a meeting to tell them that they needed to tell their classes that a student from their school had died. Unfortunately the student killed was someone Fuller knew fairly well, they have been in scouts together for the last couple years. This sweet boy died in a tragic murder/suicide situation at the hands of his father. Fortunately the school did not share any of the details of his death with the students, just the fact that he had died. I have always tried to protect my children from the harsh realities of the world, but that job is becoming increasingly difficult. Fuller didn't really want to talk about it, or how he was feeling. He did share how strongly it had affected others in his class who had known him. Now Paul and I are faced with a quandary, on the one hand I don't want him to know any more than he already does. I don't want him to have to think about the fact that a parent could do something so terrible. However, if we don't tell him and he hears it from someone else, that might be worse. Because who knows how they would handle the information. We have a little bit of a buffer period right now since there's no school for the next week and a half. At least Fuller won't be around a lot of kids who might be talking about it. What's a mother to do?