Spencer says: "Chechnya is the Muslim area of the Caucasus that has been waging jihad against the Russians since the 19th century."
AP: Boston bombing suspects 'identified' as brothers from Russia, near Chechnya RT, April 19, 2013
The man reportedly lived in Turkey before arriving legally in the US about a year ago.
The name is listed among the recipients of Cambridge scholarships in 2011.
The second suspect is said to be his brother.
An NBC report claims the two immigrated at least two years ago. One of the brothers is said to have a Massachusetts drivers’ license.
There is a page at the Russian social network VKontakte (In Contact) with the name Dzhokhar Tsarnaev living in Boston and studying at Cambridge Rindge & Latin School.