Sources tell CNN that federal prosecutors investigating the 2001 anthrax attacks were likely to seek the death penalty against a top US biodefense researcher who has committed suicide.

• 本台收到消息称调查2001年炭疽热袭击事件的联邦调查员可能将死刑的责任归于一位已经自杀身亡的美国生化防御专家上。