In a court filing Monday, prosecutors said Martinez was singled out for death among the more than a dozen people charged in connection with the crimes because of his “substantial planning and premeditation” and “his lack of remorse for his violent acts.”
The Trump administration announced plans in July to resume executing federal prisoners, after a 16-year moratorium. A judge blocked the executions in November, determining that the Justice Department’s proposed lethal-
injection procedure “is not authorized” by federal law. The Supreme Court refused to let executions resume while the legal battle continues.
President Trump makes frequent references to MS-13 by its full name, La Mara Salvatrucha, including in his most recent State of the Union address, in which he said a border wall was needed to keep the “savage gang” out. The gang was formed in Los Angeles during the 1980s by Salvadorans and has taken over large swaths of Central America and found members in some regions in the United States, including pockets of the D.C. area.
Defense attorney Robert Jenkins said he was informed by the Justice Department of its decision, a step he said he believed was taken to support the president’s stance on illegal immigration.
“I strongly suspect politics is playing a significant role rather than whether or not this is the appropriate thing to do to serve justice,” Jenkins said. “Whether or not they truly believe that justice would be served by seeking the death penalty I think is maybe a secondary concern versus what political chips they can gain with his base by appearing to be tough on illegal immigrants.”
Jenkins said Martinez, an immigrant from El Salvador, did not have a violent criminal history and is not alleged to have inflicted blows in either slaying.
In their filing, prosecutors said Martinez has a history of uncharged violent conduct, including assaults, stabbings and another attempt at kidnapping and homicide. While in jail awaiting trial, they say, he was twice found with a shank.
The deaths of Edvin Mendez, 17, and Sergio Triminio, 14, came during a grisly spike in violence in the Washington region that has since abated amid a crackdown by law enforcement. Killings connected to the gang in the area fell from at least 33 in 2016 and 2017 to seven the following year.
It was in the summer of 2016, according to court documents, that a member of the Park View Locos Salvatrucha group saw the photos on Mendez’s Facebook page that would lead to his death: a man surrounded by three 6’s. The image led them to mark Mendez, an aspiring member, as a spy for the rival 18th Street Gang. .
Authorities said MS-13 members lured Mendez to Holmes Run Stream Valley Park under the pretense of a gang meeting, killed him and buried his body, according to an indictment. They took turns filming the death, authorities allege, and the video was sent to gang leaders to help the killers earn promotions.
Mendez’s family spent the weeks after his disappearance searching anxiously for information. His brother reached out on Facebook to Triminio, an acquaintance. An associate of MS-13, Triminio admitted that Mendez had been targeted for death by the gang, authorities said.
A day later, according to court records, Triminio got a message on Facebook telling him to go to Fairfax for a gang meeting. His family last saw him leave their Alexandria, Va., apartment in his pajamas to take out the trash. Authorities alleged that gang members from Maryland were brought in to help carry out the slaying.
His body was found near Mendez’s in another shallow grave.
That killing was also recorded. A video recovered from one participant’s phone showed a young man in pajamas being attacked with a kitchen knife and machete as he lay facedown on the ground, according to a federal indictment.
Prosecutors say the gang had come to believe Triminio also spoke to the police.
Beyond Martinez, 10 more gang members will go to trial in connection with the killings but are not facing the death penalty. Two more were not charged with murder, although court records indicate they were involved. They could be called to testify at trial.
Jay Lanham, the executive director of the Northern Virginia Regional Gang Task Force, said the Holmes Run killings represented a peak in the gang’s activity in recent years.
“That was high tide of homicides,” Lanham said. “Since then, homicides have subsided somewhat. We are still seeing MS-13 members keep a low profile. We saw them lose a lot of leadership.”
An earlier version of this article incorrectly stated that authorities allege MS-13 members in Virginia called in Maryland gang members to participate in the killing of Edvin Mendez. Authorities allege that happened in the slaying of Sergio Triminio. It also said the gang had taken over swaths of Central America and regions of the United States. It should have said the gang has found members in regions of the United States.
Mark Berman, Devlin Barrett and Justin Jouvenal contributed to this report.