While injured, authorities say Dzhokhar had taken the time to write on the walls of the boat in black pen. When authorities arrived, a bloodied Dzhokhar surrendered.
Based on the image obtained by ABC News, he begins the message with the Muslim statement of faith, saying that there is but one god, Allah, and Muhammad is his messenger.
Aside from the aforementioned legible messages, much of the rest of the note in the image is unintelligible due to the red liquid, bullet holes and fading ink.
Michele McPhee is a freelance reporter and frequent ABC News contributor based in Boston. ABC News’ Lee Ferran contributed to this report.