The surviving Boston Marathon bombing perpetrator , Dzhokhar Tsarnaev , was charged in June 2013 with the federal offense of " use of a weapon of mass destruction " after he and his brother Tamerlan Tsarnaev allegedly placed crude shrapnel bombs , made from pressure cookers packed with ball bearings and nails , near the finish line of the Boston Marathon . He was convicted in April 2015 . The bombing resulted in three deaths and at least 264 injuries
Boston Marathon bombing
Boston Marathon bombing
Weapon of mass destruction