There was NOT a second gun. The MIT officer’s holster was rigged in such a way that the gun could not be removed.
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Fox mentioned that too and I wondered why they said he got the gun. One thing bothers me.
tamerlan had the only gun as he was firing at the police and they killed him, his brother jumped in the car and ran him over. How did his brother get the gun from tamerlan in all that chaos?
I don't know if you saw any footage of the shootout, but, you could see there was a lot of gunfire and a lot of confusion. I don't think the cops knew for sure how many guns these guys had because not only was there shooting going on but there were pipe bombs being lobbed at the cops and also another one of those pressure cooker bombs apparently went off as well.