Involuntary manslaughter for BART's policeman

From the "Oh-I-thought-it-was-a-Tazer" Department (of the Bay Area Transit Police), LA: The police officer who drew his gun and then fatally shot an unarmed 22 year-old lying face-down at an Oakland (LA, USA) train platform, has been convicted of involuntary manslaughter. This killing has achieved notoriety as it took place in front of a train full of witnesses, many of whom recorded the killing. A number of the recordings have found their way onto the internet. According to the attorney general, "We believe Johannes Mehserle was guilty of the crime of murder. We presented the case that way, we presented the evidence that way, and the jury found otherwise."