If that was the case the cops should have retreated and called in somebody who knew what they were doing. If the guy was holding a hostage and it would be a different story...the only hostage was himself.
Your ignorance is noteworthy. Where is there evidence these officers did not know what they are doing?
Do you understand the article was approx 10 sentences long with absolutely no specifics? Please stop with your ASSumptions that the officers are at fault, it is premature and ridiculous.