[concerned about politics]

See post #48 (Face book photo from Saudi suspect). See second guy from left. Fake arm. Watch FBI video. He never moves his arm. From the back, it looks as though it's "attached" under his coat.
His hair matches. His nose matches. His beard matches.

Other suspect is probably the taller guy in the back with his arm up.

[CharlotteVRWC]

you are right,,, the 2nd guy from the left has an ‘abnormal’ looking arm (fake or malformed).

[conservativebabe]

I dunno, the top left pic of white cap dude looks like he’s holding something and doesn’t look like a gimp arm to me.