The director of research at a Massachusetts biotech firm has been accused searching online for deadly poisons and purchasing 800 castor bean seeds so he could extract the toxin ricin from them, federal prosecutors say. Dr. Ishtiaq Ali Saaem, 37, was charged on Tuesday with obstruction of justice after he allegedly lied to FBI agents when they were investigating why he was trying to acquire the deadly toxin. Authorities say Saaem had ordered 100 packets of castor beans, which each contained eight seeds, online.