
Tamerlan Tsarnaev, one of the Boston Marathon bombing suspects, was the subject of an April 2009 photo essay that appeared in a graduate school magazine at Boston University. According to the article, he had hoped to become a naturalized American and make the U.S. Olympic boxing team. Authorities say an overnight shootout with police left him dead on April 19, 2013.

Tsarnaev answers a call while walking to boxing practice at the Wai Kru Mixed Martial Arts center in Boston.

Tsarnaev practices boxing at the Wai Kru Mixed Martial Arts center.

Tsarnaev shows how he strengthens his ankles, according to the photo essay. The photographer did not want to be named for this story.

Though he had lived in the United States for five years, Tsarnaev said in the essay: "I don't have a single American friend. I don't understand them."

Tsarnaev works out.

Tsarnaev stretches during boxing practice.

Tsarnaev tapes up his hand.