How sad that he was not recognized as a troubled youth! Awareness is a great healer, and gets our heads up and looking for other signs. Praying that everyone who needs it gets help! Praying also that there are lots of "talk sessions" in school and at homes with lots of listening!
A number of years ago, there was a pste of suicides in our middle school. More awareness of all concerned has made a big difference.
Take deep breaths and do what you need to do!