Given the information available, that seems an inappropriate statement. Nothing has been confirmed at all. We have an account on the internet of a presumed witness who doesn’t claim to have seen the alleged escalation. Did perpetrator pull a shank, shiv, knife? The streets are cold, it isn’t beyond imagination that a presumed vagrant would have such a thing for self defense. These weapons are more deadly than guns at less than 21 feet. Did the guy pull a gun? Did he reach for and possible get control of the officer’s gun, taser, or other weapon? In a confined space the decision needs to be made in milliseconds rather than seconds. Should the officer have waited for backup? In Siskiyou County would help have come in moments or hours at that time on Christmas? What was the relative risk of engagement versus inaction. How was the second victim shot? Officer missed? Bullets entered/exited perpetrator? Perpetrator had control of the weapon? Was the perpetrator high? Sometimes it takes many rounds to put down intoxicated persons because of the disruption to pain sensors. I’ll grant that the cop was trigger happy is certainly a possibility needing investigation, but in light of what little evidence we do have that theory seems less likely than certain others. It seems something went really bad during the attempt to force the man from the train. If the officer decided to use deadly force, he should have shot until the perpetrator ceased to be a threat. In any case, the fact is that we know next to nothing, and we should abstain from any rush to judgment about the merits of the case until facts are established.