Looking on the internet deeply has found these results:

made a school massacre is the most popular phrase on the web.

committed a school massacre 14,540 results on the web	made a school massacre 137,800,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Eastport teen denied bail for planning school massacre. Because you committed a federal crime to protect my feelings. One of your people committed a homicide. You have committed a perjury in this court. except plan a school massacre. The Commission itself says that there is a risk of a link between violent video games and the school massacre in Finland, for example. Fresh in all our minds is the Jokela School massacre, which was not the first example of such an occurrence. Nothing	Fresh in all our minds is the Jokela School massacre, which was not the first example of such an occurrence. Nothing Eastport teen denied bail for planning school massacre. except plan a school massacre. The President made a statement on the tragic events that had taken place that day at a school in Winnenden, in the German state of Baden The Commission itself says that there is a risk of a link between violent video games and the school massacre in Finland, for example. Similarly I do not believe that a school textbook on the history of Europe should be made a compulsory subject for study in all the Member States. Württemberg, where a former pupil had killed several schoolchildren and teachers and wounded two policemen.

committed a school massacre

14,540 results on the web

made a school massacre

137,800,000 results on the web

More popular!

Eastport teen denied bail for planning school massacre.
Because you committed a federal crime to protect my feelings.
One of your people committed a homicide.
You have committed a perjury in this court.
except plan a school massacre.
The Commission itself says that there is a risk of a link between violent video games and the school massacre in Finland, for example.
Fresh in all our minds is the Jokela School massacre, which was not the first example of such an occurrence.
Nothing

Fresh in all our minds is the Jokela School massacre, which was not the first example of such an occurrence.
Nothing
Eastport teen denied bail for planning school massacre.
except plan a school massacre.
The President made a statement on the tragic events that had taken place that day at a school in Winnenden, in the German state of Baden
The Commission itself says that there is a risk of a link between violent video games and the school massacre in Finland, for example.
Similarly I do not believe that a school textbook on the history of Europe should be made a compulsory subject for study in all the Member States.
Württemberg, where a former pupil had killed several schoolchildren and teachers and wounded two policemen.