I recall NPR in the US took some steps about covering stories like this based on what psychologists studying killers found from talking to them. They would try to minimize how often they mentioned things the killers wanted to hear in the news: The killer's name, limit describing the chaos of the event, avoid manifesto type discussions and just cover that aspect very generally.

Instead they'd focus on things that it seems like mass killers really don't like to hear about, the names of the victims, stories about the community and etc .... and in a lot of ways those actually seem like the more important things too.