However, the bomb's true composition was not able to be ascertained from the crime scene and Robert Blitzer, a senior FBI official who worked on the case, stated that there was "no forensic evidence indicating the presence of sodium cyanide at the bomb site."
然而，炸弹的真实成分已经不能从犯罪现场查明了，一位负责这个案件的FBI高级官员罗伯特·布利策（Robert Blitzer）说明“在被炸的废墟没有找到合法的证据证明炸弹中存在氰化钠。