Over the years, U.S. law enforcement and intelligence officers have tracked a host of elusive criminals, most of them within the United States. Here are some of the most prominent examples.
Osama Bin Laden
UPDATE (10:52am): Ruslan Tsarni, the uncle of the suspects in the Boston Marathon bombing, delivered his condolences to the victims of the bombings and said he was shocked that the children of his brother might have been involv
An arrest has been made in connection with letters sent to President Barack Obama and Sen. Roger Wicker that authorities are testing to determine if they contain ricin, two federal law enforcement officials said Wednesday.