I did not; it's impossible to read due to it being behind a paywall. Despite my ability to pass the paywall without paying, the full article doesn't load regardless; likely it looks for user information existing in order to pass the remainder of the article beyond the first paragraph.
Putting news behind a subscription paywall is a good way to get me to not care what you say, especially when it looks like ads are there even if you subscribe.
That aside, and taking it at face value, I don't see the correlation between fighting with the officer, and attempting to take his gun. I'd still want to see video to make a judgement call on it.
Even BEYOND that, I'd argue you're being incredibly harsh to presume that a teen is to be expected to act rationally in a fight where the other side has weapons, else expect to be killed. Is it foolish to go for an officer's gun? Yeah, of course it is? Should the officer retaliate by taking said gun in hand and shooting the teen? Absolutely not. The suspect was unarmed, attempted to become armed, and was subsequently disarmed and then murdered for it. The officer should be expected to be able to EASILY apprehend a teen without resorting to shooting them.