just in to cnn. new information about the night dzhokhar tsavraev was found hiding in a boat. susan candiotti with a message that dzhokhar tsavraev left in the boat. susan, what do you know? reporter: good morning. it turns out he wrote a message literally on the inside of the boat while lying there injured and bleeding from injuries that he and his brother obtained in the shoot-out with watertown police hours earlier. dzhokhar apparently used a pen or some kind of writing instrument according to a u.s. law enforcement official, and he scribbled that he would not miss his older brother tamerlan and expected to be joining him soon. in the makeshift message, according to our source, it indicated a motive for the boston bombing. that it was payback against the united states for attacks against muslims in afghanistan and iraq. according to our source.