NEW : Funeral home releases details of brother 's death site . NEW : The funeral home 's owner says there is no gravesite yet . Source : Investigators find alcohol residue in three places at the suspects ' home . Source : Brothers planned a suicide attack on July 4 , the suspect told police .
NEW : Funeral home releases details of suspect 's death certificate . NEW : The funeral home 's owner says there is no gravesite yet . Source : Investigators find explosives residue in three places at the suspects ' home . Source : Brothers considered a suicide attack on July Fourth , the suspect told investigators .