Washington (CNN) -- The picture emerging of the dead gunman in Monday's rampage at the Washington Navy Yard is a study in contrasts, one of a man who practiced languages and meditated, and another of a cold-blooded killer.

His last known address was outside of Fort Worth, where he was roommates for three years with Nutpisit Suthamtewakul, who described Alexis as his best friend.

Alexis befriended Suthamtewakul four years ago after he emigrated from Thailand.

Alexis taught him about American culture, Suthamtewakul told CNN. Alexis, he says, was fluent in Thai and attended a Buddhist temple.

http://www.cnn.com/2013/09/16/us/navy-yard-suspects/index.html