Poison spread at DC Metro Stations - death of birds

29 July 2007; 5:30 P.M. ET DEVELOPING: Investigators are looking for a person driving a black pickup truck who witnesses saw spraying or spreading an unknown material causing the immediate death of area birds. Media reports are identifying the substance to be commercial rat poison, however the immediate and widespread death of birds appear to contraindicate the use of rat poison as the sole agent. Developing…

Related? See article from 8 January 2007: Dead birds- Austin, Texas