Why school zero tolerance policies make no sense

Valerie Strauss:

The discipline policy in Fairfax County public schools failed Nick Stuban.
Stuban was a 15-year-old football player at W.T. Woodson High School who committed suicide during a disciplinary process that he was forced to undergo after he purchased a capsule of a legal substance.
According to a story by my colleague Donna St. George, he was kept out of school for seven weeks and not allowed on the school grounds to attend weekly Boy Scout meetings, sports events, or driver’s education sessions. He killed himself Jan. 20.
This is not say the disciplinary system drove him to kill himself, or another boy before him in 2009. Suicide is complicated, and the reasons someone decides to take his/her own life are complex and often unknowable.