A new report by the Committee to Protect Journalists says that at least 42 journalists worldwide were killed in 2017 in retaliation for their work — which marks a drop from the 48 killed last year.

But one country defied what appears to be a downward trend — Mexico.

According to the New York based nonprofit, six journalists were killed there this year, putting Mexico just behind Iraq and Syria as the deadliest places in the world to work in the media.

Another reporter may be added to Mexico's murdered list for this year. On Tuesday, Gumaro Perez Aguilando was killed in the state of Veracruz. The 35-year-old crime reporter was gunned down while attending a Christmas party at his son's elementary school.

Perez was registered in the state's journalist protection program. But Wednesday, state investigators said he was no longer a working journalist and had ties to organized crime. That drew an angry protest by the secretary of the state's Commission for the Attention and Protection of Journalists.

"A discussion of a person's character, with the intention to judge him and criminalize him, does not help those of us who desire justice for journalists who have been assassinated," said Jorge Morales Vazquez.

Outside of conflict zones, Mexico takes the No. 1 spot for journalists murdered in 2017. The CPJ is investigating another 20 killings possibly related to journalists' work but, so far, no connections have been made.

"The rise in the number of journalists murdered in Mexico in retaliation for their work is terrible news and suggests that the Mexican government has failed in its public commitments to end the culture of impunity," says Joel Simon, the executive director of the Committee for the Protection of Journalists.

Mexican officials say they are working to stop the murders. They point to a federal protection program for media workers that provides body guards and even "panic buttons" to summon police in case of danger. But journalists enrolled in the program say it doesn't work and is inadequate for the threat they face.

Organized crime gangs and corrupt officials offended by reporters' coverage are believed to be behind the killings. With few cases resolved, it is difficult to say for sure who is behind the murders.

The Paris-based Reporters Without Borders says the number of reporters killed in Mexico is higher, putting the figure at 11 this year. Local press freedom groups put the number even higher. Each group has different criteria to determine whether a media worker was killed in retaliation for his or her profession.

Many reporters in Mexico have been forced out of the profession or have opted to self-censor. Many more vow to fight on despite the threats. Most at risk are reporters working for small outlets, far from Mexico City.

That was not the case, however, in the murder of Miroslava Breach , who covered crime and corruption as a correspondent for the national newspaper La Jornada in the northern state of Chihuahua. Breach was killed on March 23. Gunmen shot her in her car as she pulled out of her driveway, with one of her three children sitting next to her. At the time, reporter Javier Valdez , one of Mexico's most acclaimed chroniclers of the country's drug war, defiantly wrote about Breach's killers.

"Let them kill us all, if that is the death penalty for reporting this hell, No to silence," he penned.

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