A Bronx neighborhood was outraged last month when a building's mural memorializing 9/11 and a local firefighter who was killed at the World Trade Center was tagged by a graffiti artist. The tagger painted his initials directly over the face of Peter Bielfeld. Tips eventually led police to arrest 16-year-old Avery Prince, who goes by the tag SIPS and has since apologized for defacing the mural. more ›