On September 7 a man dressed in a red hooded jacket and rain cap walked into the SunTrust bank at 3610 King St. and demanded money, marking the citys 15th bank heist since January 2009.

The unidentified suspect, described as a black man about 45 years old with a thin build, remains at large. The early September robbery is one of seven since 2009 still under investigation by local and federal authorities.

Of the 15 heists since 2009, city police have made arrests in connection with two. Authorities in other jurisdictions, including the Federal Bureau of Investigation, have arrested individuals linked to six of those cases in Alexandria.

Serial bank robbers or those who have crossed into Washington or Maryland and committed more heists are sometimes prosecuted by federal agents or other muncipalities, said Jody Donaldson, department spokesman.

Local authorities are cooperating with their counterparts in Montgomery and Arlington counties in the hunt for one such individual, wanted for robbing 11 banks in two states starting in July 2010. Hes allegedly responsible for two robberies in Alexandria in the span of a week: the 600 N. Washington St. Bank of America on December 20 and the 1700 Diagonal Road PNC Bank December 27.