Here is what we know -- or what we think we know -- about Tamerlan Tsarnaev: He was a boxer and a "gifted athlete." He did not smoke or drink -- "God said no alcohol" -- and didn't take his shirt off in public "so girls don't get bad ideas." He was "very religious." He had a girlfriend who was half-Portuguese and half-Italian. In 2009, he was arrested after allegedly assaulting his girlfriend. He was "a nice guy." He was also a "cocky guy." He was also a "a normal guy." He loved the movie Borat. He wanted to become an engineer, but his first love was music: He studied it in school, playing the piano and the violin. He didn't have American friends, he said -- "I don't understand them" -- but he also professed to appreciate the U.S. ("America has a lot of jobs .... You have a chance to make money here if you are willing to work"). He was training, as a boxer, to represent the U.S. in the Olympics.
We know, or we think we do, that Tamerlan's brother, Dzhokar, is "very quiet." Having graduated from the Cambridge Rindge and Latin School -- a public school known for its diverse student body -- he received a scholarship from the City of Cambridge. He went to his prom, with a date and in a tux. He had friends. He posed with them, smiling, at graduation. He tweeted pictures of cats. He skateboarded around his Cambridge neighborhood. His personal priorities, he has said, are "career and money." He is a second-year medical student at UMass Dartmouth. He is seemingly Chechan by birth and Muslim by religion, and has lived in the U.S. since 2002. He is "a true angel." He has uncles in Maryland. He called one of them yesterday and said, "Forgive me."