Not convincing, despite the accusations here. You can find the guy moving away from the blast, into the crowd, with his backpack in most of the shots being used for the other suspects.

What's hilarious is someone thinks it is very convincing while posting a spreadsheet that shows it is not...

This one actually looks like the backpack in the FBI photo. Specifically the gray stripes on the shoulder straps.

Yeah, this one is very convincing. There are a few other pictures of this guy all over Reddit with different angles/face shot. The bag appears to match. But there were plenty of other people in the immediate area with similar bags.

Also, some people put their bags down near/between their legs to watch the race. That doesn't mean they were planting a bag. Something to consider.

I'm sure the FBI is all over Reddit and every site/photo they can get their hands on.

Neat little Google Spreadsheet here breaking down the suspects, photos, etc. https://docs.google.com/spreadsheet/lv?key=0AgtCl8YvqiBodEl0...

I think there's a ton of photographic evidence out there, a lot of which we don't have access to (CCTV, pro photographers, media, etc.) FBI has all of this is analyzing it like crazy.

I wonder what kind of system they are using to create a virtual timeline of events with photos and video evidence to sift through the content...

I think this pic needs its own top level comment. This looks very convincing to me.

You can tell by the scraggly beard that he's guilty.

Wait, that guy is the topic picture as well. http://imgur.com/Wp2dH21