New York police Sgt. Damon Martin in the 75th Precinct field intelligence office, where the walls are covered with photos of seized illegal guns.

New York police Sgt. Damon Martin in the 75th Precinct field intelligence office, where the walls are covered with photos of seized illegal guns.

New York police Sgt. Damon Martin in the 75th Precinct field intelligence office, where the walls are covered with photos of seized illegal guns.

New York police Sgt. Damon Martin in the 75th Precinct field intelligence office, where the walls are covered with photos of seized illegal guns.