But now attention has turned to the police and, in particular, its initial sketch of the likely suspect. The image shows the suspect as a young African American man wearing sunglasses.
Perrone, a white, 64-year-old garment salesman with thinning hair, could not look more different. Authorities previously offered rewards of more than $20,000 for information leading to an arrest and conviction.
All three victims were of Middle Eastern descent with stores within a 5-mile radius of each other. Two were killed in the summer, while the last incident occurred this month when 78-year-old Rahmatollah Vahidipour was killed in Brooklyn's Flatbush neighbourhood.