http://www.theatlanticwire.com/national/2013/05/dzhokhar-tsarnaev-confession-note/65283/
"Boston bombing suspect Dzhokhar Tsarnaev reportedly wrote a note
claiming responsibility for the attacks on the marathon one month ago
— and stating that he and his brother were motivated by a desire for
Muslim retribution for the U.S. role in the wars in Afghanistan and
Iraq. Ever the elusive young terror figure, Tsarnaev allegedly penned
the note on the interior of the boat where he was found after a day-
long manhunt on April 19, and CBS reports that this note will now be
used in court."