NEW : ` While the crime scene processing was under way in that room , we found some notes and some writings that indicated that this was a planned attack , '' UCF Police Chief Richard Beary told reporters . James Oliver Seevakumaran , 30 , had built four homemade bombs , police chief says . NEW : A man who was arrested in connection with the Boston Marathon bombings has been charged with using a weapon of mass destruction and other offenses related to explosives manufacturing and possession of explosives. NEW : Authorities piecing together information to figure out who he planned to attack . NEW : He had few friends , had anger issues , chief says .
NEW : James Oliver Seevakumaran , 30 , had built four homemade bombs , police chief says . NEW : A man who was arrested in connection with the Boston Marathon bombings has been charged with using a weapon of mass destruction and other offenses related to explosives manufacturing and possession of explosives. NEW : Authorities piecing together information to figure out who he planned to attack . NEW : He had few friends , had anger issues , chief says .