clo,
re: "Reports say it was a tear gas canister."
What's your source? It seems you're too quick to judge. Reports are saying a LOT of things.
Reuters: "Protest organizers say the ex-Marine was hit by a tear gas canister fired by police. City and police officials have not said how they believe Olsen was hurt but Jordan has opened an investigation into the incident."
The Associated Press: "It’s not known exactly what type of object struck Olsen or who might have thrown it, though Guy’s group said it was lodged by officers."
JSOnline: "Scott Olsen, 24, who served two tours of Iraq, was struck by an unidentified object as Oakland police and Occupy Wall Street demonstrators clashed. Some witnesses said Olsen was hit by a tear-gas canister; others said it was a rubber bullet fired by police."
Hmmm. And *THIS* is certainly interesting:
http://www.verumserum.com/?p=31617
" It has been widely reported that Olsen is a member of Iraq Veterans Against the War. But apparently his opposition to the U.S. military and the Marine Corps in which he served runs a little deeper.
The site is no longer live, but Olsen was the founder of IHateTheMarineCorps.com, a private user forum apparently dedicated to bashing the Marine Corps."
and, from Scott's own site:
"I was talking to my 1stsgt regarding a pending adsep since i had been accused of using cocaine. Anyway, when we were done talking, he used as a parting greeting “stay marine”. He clearly didn’t think that one through. It was no secret that I couldn’t wait to get out and on top of that, the MC was trying to kick me out. I was going to bust his balls over it, but I went and took a nap instead."

Gold is $1,581/oz today. When it hits $2,000, it will be up 26.5%. Let's see how long that takes. - De 3/11/2013 - ANSWER: 7 Years, 5 Months