I am not sure of the validity of this source, but there is a new article (yesterday) from a group called the guardian.
The Guardian is one of the UK's national newspapers from the respectable end of the journalism spectrum. Notably left wing, liberal. It is they that doggedly pursued the phone hacking allegations until they brought down the News of the World.
It seems as if the police were too heavy handed (as they usually are).
There is, as yet, nothing to support this claim. He was armed, and police are entitled to shoot when they believe they are under immediate threat; if he made an action that looked like he was raising the gun then they were perfectly within their rights to open fire.
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