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A Mississippi man suspected of sending poison-laced letters to President Barack Obama and two other officials was charged in a five-count federal indictment made public Monday that could send him to prison for life if he's convicted.
A law enforcement official says a Texas home has been searched and a resident interviewed as part of the investigation into ricin-tainted letters sent to New York City's mayor and President Barack Obama.
Prince George's County's hazmat team was called to a federal mail processing center in Landover to help federal agents who are investigating suspicious letters to members of Congress and the president.
A union representing postal workers says the U.S. Postal Service waited hours to alert workers that they may have been exposed to the dangerous poison ricin.