In sport, Oscar Pistorius demonstrated how easy it is to be wrong about people. An athlete with prosthetic limbs competing at the Olympic Games? No way!
That lesson - don't leap to hasty, ill-informed conclusions - is worth remembering now as the double-amputee Olympian stands charged with murder in the shooting of his girlfriend.
Her life is gone. Anyone who declares that his life, for all intents and purposes, is now over, too, had better be 1000 percent sure of themselves. The question "What happened?" is, of course, natural. It was on all our lips. But the response cannot be found by pouring through old interviews Pistorius gave or from his now silent Twitter account. This is a murder investigation, not a guessing game. Serious stuff that needs to be treated as such.