DA Needs To Explain Non-Prosecution of Naked Harvard Student

There may be a good reason for not prosecuting the naked Harvard College student who took illegal drugs, took off his clothes in the median of a busy street, threw them at a woman, refused to cooperate with cops who showed up, grappled with cops for an extended time on the ground, and then spat blood and saliva at a paramedic.
But the problem is, authorities haven't given any. By that, we don't just mean that they haven't given a good reason.