Autor Material de un Crimen.

Perpetrator.

"The perpetrators of the massacre must be brought to justice as war criminals."

Cambridge Dictionary Online.

In News:

"The Israeli deputy police commissioner, Shahar Ayalon, said at the scene it was "definitely a terrorist attack" by the 30-year-old construction worker who – like the perpetrator of the yeshiva killings – came from Arab East Jerusalem.

The Independent UK.