RE: How long has the naturalized Citizen been living here?
What about the background of the other perp?
Tamerlan Tsarnaev, the older brother (now dead) was not a U.S. citizen but was a green card holder. He has lived in the US since he was 16 ( he is now 26 ).
Dzhokhar Tsarnaev (born July 22, 1993) the younger brother, at the time of the incident, was a student at the University of Massachusetts Dartmouth with a major in marine biology.
Like his brother, he has been living here for 10 years as a permanent resident.
He became a naturalized U.S. citizen on September 11, 2012.