When officers arrived he confronted them with this knife. And officers used deadly force. One sergeant was involved. Another was an officer. They fired seven shots total. This man was take on the San Francisco General Hospital where he died several hours later. We spoke to San Francisco police chief and a witness about what happened. Heres what they had to say. We had been working, very hard to figure out ways to contend folks with edged weapons or other weapons trying to create time and distance. Apparently this event unfolded quickly. Well be looking to find out why it had to go just as it did. Im conflicted. I understand they have a very difficult job. But a psycho with a knife should not be a death sentence. Reporter this is a first fatal officerinvolved shooting in San Francisco since the december shooting of mario woods. He too was armed with a knife when he was shot and killed. This continues the on going debate on whether San Francisco officers should be armed with tasers. Sinc