Northern Monkey ... who can't upload a bleeding Avatar
Well apart from someone being dead as a likely consequence, yes.
To my mind, what he did is no different to me going out driving at high speeds while knowing my car's brakes were fúcked and killing someone. Whether that's manslaughter or not I don't know, but it's certainly utterly reprehensible.
Perhaps it was one of those cool new-fangled push bikes with no brakes.