Last night the NYPD press office released photos and video of four people wanted for questioning in regards to the murder of 78-year-old Vahidipour Rahmatollah, who was found shot to death in his Flatbush Avenue boutique on Friday evening. Shell casings found in the shop are from the same gun used to kill two other Middle Eastern store owners in Brooklyn over the summer, and investigators suspect that this may be the work of a serial killer. The motives remain unclear.

Police sources tell the Post that investigators have spoken to two of the people they were searching for earlier today: the "Green Jacket" woman and the "Bubble Jacket" man. As we noted this morning, the woman in the green jacket was seen on video running near the scene, pulling off her jacket and throwing it away. "Bubble Jacket" man was also chasing her. But after interviewing those individuals, the NYPD has determined that the woman had stolen a bottle of perfume from a street vendor, who was chasing her in his bubble jacket.

That leaves "John Doe Duffle Bag" and "Jane Doe Long Coat," a black female with glasses and neck scarf whose image was captured just after 6 p.m. with the video camera outside of 786 Flatbush Ave, just north of the crime scene. (It's believed she may have witnessed something in regards to the crime.) But this is interesting: one police source tells the tabloid that John Doe Duffle Bag (or D-Bag for short) was also seen "on a video of poor quality around the time of the murder of shopkeeper Isaac Kadare on 86th Street in Bensonhurst on Aug. 2nd." Coincidence, or is the bald guy with the duffle bag a serial killer?

Police see a pattern. Each of the three murders was committed as the owners were closing up their stores, and each took place in establishments without interior surveillance cameras. Investigators have also noted that all of the store's addresses had the number eight in them. The FBI’s Behavioral Unit, which oversees investigations into serial killers, has now joined the investigation. "I think it's reasonable to assume... some sort of reconnaissance was carried out,” Browne told reporters today.

NYPD wants to question these people in hunt for serial killer from Gothamist on Vimeo.