MS-13 Leader Sentenced to 40 Years in Prison for RICO Conspiracy and Murder of Teenager

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FILE PHOTO: Signage is seen at the United States Department of Justice headquarters in Washington, D.C.

BOSTON – A leader of MS-13 was sentenced today in federal court in Boston for RICO conspiracy and his participation in the July 2018 murder of a teenage boy in Lynn, who suffered at least 32 sharp force trauma wounds consistent with being stabbed repeatedly, along with blunt force injuries to the head. 

Erick Lopez Flores, a/k/a “Mayimbu,” 33, of Lynn, was sentenced by U.S. Senior District Court Judge Mark L. Wolf to 40 years in prison and five years of supervised release. In July 2020, Lopez Flores pleaded guilty to one count of conspiracy to conduct enterprise affairs through a pattern of racketeering activity, also known as RICO conspiracy, on behalf of the MS-13 gang. As part of his plea, Lopez Flores also admitted that he participated in the 2018 murder of a teenager, who was murdered with extreme atrocity and cruelty, and with deliberate premeditation, in violation of Massachusetts law.

MS-13, or La Mara Salvatrucha, is a transnational street gang operating in Massachusetts and numerous other states, as well as countries such as El Salvador, Honduras and Guatemala. MS-13 gang members often commit acts of extreme violence against suspected rivals, those suspected of cooperating with law enforcement, and others who the gang views as a threat. In recent years, dozens of MS-13 members have been convicted of RICO conspiracy and other serious felonies in the District of Massachusetts. 

MS-13 is organized into “cliques” or branches operating in local territories. Lopez Flores belonged to the “Sykos Locos Salvatrucha” clique of MS-13, which operated in the cities of Lynn, Chelsea and other parts of Massachusetts. Lopez Flores was one of the leaders of the Sykos clique and had been an MS-13 member since approximately 2006. 

In November 2018, Lopez Flores and five other MS-13 members of the Sykos clique were indicted following an investigation into the murder of a teenage boy, whose body was found in a park in Lynn on Aug. 2, 2018. The six defendants in this case included five participants in the murder, as well as one longstanding member of the Sykos clique. In a related case, the government charged a juvenile co-conspirator who was the sixth person involved in the murder. 

The evidence in this case, which included a recording of one of Lopez Flores’ co-defendants describing the murder in graphic detail, revealed that Lopez Flores and five other MS-13 gang members murdered the victim based on their mistaken belief that he may have been assisting law enforcement.

On July 30, 2018, the gang members lured the victim to a playground and at least four of them were armed with knives. The group pretended to be friendly with the unsuspecting victim and took him to a wooded area of the park. At the scene, the gang members surrounded the victim and repeatedly stabbed him to death. At least four of the six assailants stabbed the victim, while Lopez Flores and a juvenile gang member assisted at the scene. Lopez Flores authorized the murder in his capacity as one of the leaders of the clique. After killing the victim, the gang members left his body in the wooded area of the public park. An autopsy revealed that the victim suffered at least 32 sharp force trauma wounds consistent with being stabbed repeatedly, along with blunt force injuries to the head.

All six defendants indicted in this case, along with the juvenile charged in the related case, have pleaded guilty. Lopez Flores is the first defendant to be sentenced. Jonathan Tercero Yanes, a/k/a “Desalmado,” is scheduled to be sentenced on Feb. 15, 2022 for RICO conspiracy and his participation in the July 2018 murder; Henri Salvador Gutierrez, a/k/a “Perverso,” is scheduled to be sentenced on Feb. 16, 2022 for RICO conspiracy and his participation in the July 2018 murder, as well as his participation in a December 2016 murder in East Boston; and Djavier Duggins, a/k/a “Haze,” is scheduled to be sentenced for RICO conspiracy on Feb. 17, 2022. Sentencing hearings for the two remaining co-defendants, Marlos Reyes and Eliseo Vaquerano Canas, have not yet been scheduled by the Court.

First Assistant United States Attorney Joshua S. Levy; Joseph R. Bonavolonta, Special Agent in Charge of the Federal Bureau of Investigation, Boston Division; Matthew B. Millhollin, Special Agent in Charge of Homeland Security Investigations in Boston; Colonel Christopher Mason, Superintendent of the Massachusetts State Police; Essex County District Attorney Jonathan W. Blodgett; Suffolk County District Attorney Kevin Hayden; Acting Boston Police Commissioner Gregory Long; and Lynn Police Chief Christopher Reddy made the announcement. Assistant U.S. Attorneys Kunal Pasricha and Kaitlin O’Donnell of the Criminal Division prosecuted the case.

This effort is part of an Organized Crime Drug Enforcement Task Forces (OCDETF) operation. OCDETF identifies, disrupts, and dismantles the highest-level criminal organizations that threaten the United States using a prosecutor-led, intelligence-driven, multi-agency approach. Additional information about the OCDETF Program can be found at