NEW : Source : Tamerlan Tsarnaev director reiterates investigation found no terror ties to FBI . Source : Dzhokhar left a message in boat where he was found hiding . He wrote that the Boston Marathon bombing victims were collateral damage . Dzhokhar Tsarnaev also said he expected to join his brother in death .
NEW : Tamerlan Tsarnaev director reiterates investigation found no terror ties to FBI . Source : Dzhokhar left a message in boat where he was found hiding . He wrote that the Boston Marathon bombing victims were collateral damage . Dzhokhar Tsarnaev also said he expected to join his brother in death .