it would be something to ingest, get into your bloodstream and cause digestive problems, but it could also be lethal. when they analyze, they'll look at this compound and try to understand what was the intent, how was it intended to be weaponized and ingested and what kind of effect was it intended to have? it does sound by the description of -- sanjay's quite right -- by deb's description, this sounds like a crude compound that wasn't even terribly well executed as a contact poison. >> we'll learn more obviously in the days ahead. fran, appreciate it, sanjay as well. quick update on the murder connected to the boston bombing suspect. this is the man, ibrahim tad shetar shev, who implemented tamerlan tsarnaev in the triple killing murders. now law enforcement officials are telling "the washington post" that this man was not armed with a knife when an fbi agent shot him dead last week. the incident is currently under investigation by an fbi review