Thank you for your clarification.  Some pretty seriou bashing of one school.  All schools reflect society as a whole.  What circumstances and/or events surrounded these students are not known to me.

For clarification:  Risk assessment is in the context for this young man re-offending; i.e.,  what factors would contribute to re-offending and prevention of such occurrences.  Past history ( not just this event, but other events, good or bad) is 90% of diagnosis.  Not all abhorrent actions by young people require life time incarceration and a stamp on their foreheads.