CBS News correspondent John Miller reports it is likely Russia asked to have the elder Tsarnaev vetted because of suspected ties to Chechen extremists.
The FBI is likely to have run a background check, running his name through all the relevant databases, including those of other agencies, checking on his communications and all of his overseas travel. Miller reports that culminated in a sit-down interview where they probably asked him a lot of questions about his life, his contacts, his surroundings. All of this was then written in a report and sent it to the requesting government.
This is an issue they've had in the past. They interviewed Carlos Bledsoe in Little Rock, Ark., before he shot up an Army recruiting station in 2009. They were also looking into Major Hasan Nadal before the Fort Hood shootings.