The mysterious "John Doe Duffle Bag" is believed to be in police custody, and while he's not yet been officially named a suspect in the murder of three Brooklyn shop keepers, police sources say a rifle and other weapons were found in his duffle bag. A sawed-off Ruger 10-22 rifle, which uses same ammunition found at the scene of all three murders, was found in the duffle bag, the Associated Press reports. NBC New York's source goes further, and says the bag's contents also included ".22 caliber ammunition, three knives, one of which appeared to have blood on it, black gloves and women's pantyhouse with the legs cut off."

Investigators believe the man in custody is the same balding middle-age man seen on surveillance video in the vicinity of the most recent murder last Friday. And sources still tell the Post and NBC New York that a similar-looking man can also be seen on grainy surveillance footage near a Bensonhurst store where Isaac Kadare, 59, was gunned down and stabbed on Aug 2nd. However, NYPD Commissioner Ray Kelly denied that the man was seen on a second video during a press conference yesterday.

Police sources tell the Daily News his name is Salvatore Perrone, whom the Post describes as a "struggling Staten Island salesman who peddles clothing from a duffle bag." According to the tabloid, the man has prior arrests in Pennsylvania for burglary, harassment, and stalking. One neighbor says, “He’s always up to no good. He doesn’t want anybody to know where he’s going." Another neighbor tells the News that Perrone sleeps in the basement, and that he's “obnoxious," but cautions, "Serial killer? Not in a million years.”

And the widow of Isaac Kadare says John Doe Duffle Bag resembles a man who entered her husband's shop acting strangely a week before the murder. Ballistics tests are currently being conducted to see if the shall casings match the rifle found in the duffle bag. “We’re talking to somebody who fits the description of the man in the (video). He came in voluntarily," NYPD spokesman Paul Browne tells the News, which reports that 80 detectives have been working on the case—including detectives from the Hate Crimes unit, because all three victims were of Middle Eastern descent. The murders, however, have not officially been classified as hate crimes.