Here's Deadspin on the firefight

[RSE]

Citing New York Times, NBC News, and eyewitness Twitter.

http://deadspin.com/heres-how-tamerlan-tsarnaev-was-killed-after-a-shootou-476433523

But if you'd rather watch a bunch of cops standing around, by all means watch CNN.

[The Ref]

That read like a bad movie. Sounds like the older brother gave himself up so his little brother could escape.

[RSE]

Could be the older brother was the true believer and the younger one was the follower.