Boston Marathon Bombing Suspects' Connection to Dagestan

A look into Dzhokhar, Tamerlan Tsarnaev's family life and homeland.
1:30 | 04/20/13

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Transcript for Boston Marathon Bombing Suspects' Connection to Dagestan
We're getting a clearer picture of who these Brothers are the family came to the US twelve years ago after spending time in -- expand in Russia's Dagestan region. And Boston the boys became known as athletes -- younger arrest learn the older one a boxer. Joseph -- even became a US citizen just last year on September 11. But a year ago their father went back to -- his son after health issues and in recent ABC's Karen -- is there to find out more about this family. -- -- -- -- -- the sentencing hearing -- is done. The official that they were planning to open -- also we gig gave an interview to Russian television yesterday. After having will be needed him several times by -- yesterday. Here -- its phone anymore. The youngest son the one who was detained by police yesterday. -- -- -- for a public hears the news in the first grade. That was over a decade ago neighbors we spoke to were shocked at the news they describe it as a very normal family. One woman we spoke to Saatchi saw the oldest son -- -- one was killed by police just last year on -- -- -- itself. Extremism. That's a very different pictures of what some members of congress are saying they say it was during that visit Douglas -- last year that Havilland. Its -- became much more extreme. It's -- very important and dangerous part of Russia it's been fighting an Islamist insurgency for years. Those members of congress -- was during that visit that camera -- became radicalized.

This transcript has been automatically generated and may not be 100% accurate.

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