Police announced an arrest Wednesday in the killings of three Brooklyn shopkeepers.
Salvatore Perrone, 63, is being charged with three counts of murder.
Police previously released surveillance video showing a man walking near the 'She She' Boutique on Flatbush Avenue just after 6 p.m. Friday, near where the most recent shooting occured.
They say they got a tip that it was Perrone and brought him in for questioning.
Police say that bag contained a sawed off .22 caliber rifle, which uses the same ammunition found at all three crime scenes, according to ballistic tests.
Police Commissioner Ray Kelly said the duffel bag was found at Perrone's girlfriend's apartment.
Vahidipour Rahmatollah, 78, was shot to death inside his shop Friday.
After his killing, police discovered the same weapon had been used to kill Mohamed Gebeli on July 6 and Isaac Kadare on August 2.