The arrest of fugitive mob boss James "Whitey" Bulger leaves yet another spot open on the top 10 Most Wanted list. Another spot disappeared early this year; Osama bin Laden’s death left a spot that hasn’t yet been filled.
Last year, U.S. authorities found nearly 100 fugitives hiding out in Mexico. In 1999, only 14 fugitives were found and returned. The increase is attributed to ongoing cooperation between United States and Mexican officials along the border.