Tragedy's timeline

Events related to the Boston Marathon bombing, which killed three people on April 15, 2013:

March 2011: Russian intelligence security service gives FBI information that Tamerlan Tsarnaev is a follower of radical Islam.

June 2011: FBI closes inquiry.

Sept. 12, 2011: Bodies of three men are found in Waltham, Mass.

Late 2011: U.S. officials add Tsarnaev's mother to federal terrorism database after Russia contacts CIA with concerns.

January 2012: Tamerlan arrives in Russia.

July 2012: Russian officials say Tamerlan applies for a new passport but never picks it up. Russian officials say they have him under surveillance, but lose track of him.

July 17, 2012: Tamerlan returns to the U.S.

November 2012: Islamic Society of Boston Cultural Center says Tamerlan has an outburst during a sermon about allowing Muslims to celebrate U.S. holidays.

January 2013: Tamerlan has an outburst after a sermon praising the Rev. Martin Luther King Jr.

April 15, 2013: Bombs go off at the finish line of the Boston Marathon, killing three people and injuring more than 260 others.

April 18, 2013: Investigators release photos and video of two suspects. Later that night, Massachusetts Institute of Technology police officer Sean Collier is shot to death, allegedly by Tamerlan and Dzhokhar Tsarnaev.

April 19, 2013: The Tsarnaevs have a morning gun battle with authorities who tracked them to Watertown. Tamerlan, who is run over by his younger brother, dies. Dzhokhar escapes but is found hiding in a boat and arrested.

April 22, 2013: Dzhokhar Tsarnaev is charged with using and conspiring to use a weapon of mass destruction.

July 10, 2013: Tsarnaev pleads not guilty to 30 federal charges.

Jan. 30, 2014: Prosecutors announce they will seek the death penalty against Tsarnaev.

June 18, 2014: Tsarnaev's lawyers file first of several requests to move the trial to Washington, D.C.

Sept. 24, 2014: Judge pushes start of trial to Jan. 5, 2015.

Jan. 5, 2015: Jury selection is set to begin in Tsarnaev trial.

Associated Press