Dec 17, 2011 2:45 PM EST

Last week, a New York City officer was killed in the line of duty. Blame the Internet-and the NRA-which have made cracking down on illegal guns a losing battle. By Josh Dzieza

Two weeks ago, Officer Deriek Crouse was shot and killed on the Virginia Tech campus, a chilling reminder of the massacre at that school three years ago. This week, Officer Peter Figorski was shot and killed while responding to a robbery in Brooklyn. If it seems like there’s been a spate of officer shootings lately, there has been: Figorski was the 61st officer shot to death this year, a 17 percent increase in gun-related officer deaths over the year before. The first half of 2011 was the deadliest six months for officers in 20 years.

One question raised by Figorski’s death is how the suspect, Lamont Pride, a felon, got his gun. It might have happened easily, according to Mayor Bloomberg. Three days after the shooting, the mayor announced the results of a sting operation run against online gun dealers. Undercover investigators tried to buy guns from 125 private sellers, who aren’t required to conduct background checks. They were shockingly successful. Even after the investigators volunteered that they probably wouldn’t pass a background check had they been required to take one, a majority were still able to buy their guns, including assault weapons.

The Brady Act mandated federal background checks for people buying firearms from federally licensed gun dealers, but not for private sellers. The thinking was that it was an exemption for hobbyists, says John Feinblatt, Bloomberg’s criminal-justice coordinator. But it became what gun-control advocates call the gun-show loophole, through which 30 to 40 percent of gun sales pass, according to the Department of Justice. With the Internet, that loophole has become a "24/7 black market for firearms," says Feinblatt. "It’s even more anonymous than a gun show, which is already a magnet for criminals. But at least at a gun show you’re selling side by side with honest dealers and the ATF could be around. There’s none of that online."

Bloomberg, and the 600 other mayors in the group Mayors Against Illegal Guns that he co-chairs, are pushing for the passage of the Fix Gun Checks Act, introduced this year by New York Sen. Charles Schumer and Rep. Carolyn McCarthy. It would require a background check for all gun sales, including those by private sellers. Law-enforcement organizations from the International Association of Chiefs of Police, Major Cities Chiefs Association, and the Police Foundation have come out in support of closing the loophole.

But they face stiff opposition, and Bloomberg isn’t shy about saying who it is. "There’s one organization that's basically behind continuing the chaos in this country," Bloomberg said in this week’s press conference. "It's the NRA." One of the country’s most powerful interest groups, the NRA outspends gun-control advocates by a wide margin. In the 2010 election cycle, they spent more than $7.2 million on political messaging.

Gene Voegtlin, legislative officer at the International Association of Chiefs of Police, is grim when he describes the situation. His group supports the Fix Gun Checks Act, as well as the reinstatement of the ban on assault weapons, which expired in 2004 and which President Obama pledged as a candidate to push for. But Obama has since backed away from the ban, and except for a flurry of chatter in Congress after Rep. Gabrielle Giffords was shot, Voegtlin says, "There’s really nothing moving." Well, not quite nothing, he catches himself. "The only thing that’s moving is HR 822, the national concealed carry law, which would make the situation far worse." That bill, which passed the House last month, would make a concealed-weapons permit in any state valid in almost every other, effectively nationalizing the laxest law. "We have limited resources, unlike some organizations on the other side of this debate," says Voegtlin, "so we have to focus our efforts. For the past 10 years we’ve been on the defensive."

The Daily Beast collected the cases of several recent officer murders and the origins of the guns that killed them. Collectively, they show that almost anyone can get a gun with ease.

Officer Peter Figorski

It’s not clear how the pistol that killed Officer Peter Figorski made its way into the hands of murder suspect Lamont Pride, who had served time for armed robbery and was suspected in another shooting, but it came from a store in Virginia with a history of selling guns that end up out of state. in 1990, Dance Sporting Goods sold a pistol that eventually turned up in the Bronx, where it fired the stray bullet that killed 9-month-old Rayvon Jamison, who became a poster child for gun violence. In both cases the original buyers claimed they lost the guns.