Tsarnaev addressed the loss of his brother, Tamerlan, who had died in a police shootout earlier that day. "I do not mourn because his soul is very much alive," the message said. "God has a plan for each person. Mine was to hide in his boat and shed some light on our actions."

According to photographs and transcripts, the message included anti-American sentiments, accusing the U.S. of "killing our innocent civilians."