[betty boop]

From police statements, we know that one of the officers phoned higher command authority to ask whether they should break off the chase. Apparently, he was answered in the negative. I would personally hate to be the officer that made that decision. If nothing else, if I were he, I'm sure I'd be finding my life quite unpleasant right about now.

[habs4ever]

So, the cop should feel guilty now for continuing the chase? Was he to know that Matthews would come out firing?

You are shifting the blame here.

[wimpycat]

From police statements, we know that one of the officers phoned higher command authority to ask whether they should break off the chase.

What's this, using the police as a source? From police statements, we know Matthews drew his weapon and started blasting, too.