Argentine Diego Rosen arrested in Mexico for the crime of musician Jonathan Meléndez and his family

Diego Sebastián Rosen, a 51-year-old Argentine, was arrested in Mexico as an alleged participant in the murder of musician Jonathan Meléndez, leader of the band Camilo Séptimo, along with his pregnant wife, his three-year-old daughter, and a domestic employee. The arrest occurred on Wednesday, September 3, less than 24 hours after the bodies were found in Atizapán, State of Mexico.

The discovery of the bodies and Rosen’s arrest

On Tuesday, September 2, Mexican authorities found the lifeless bodies of Jonathan Meléndez Ochoa, his wife Ana Paula Barragán, who was four months pregnant, their three-year-old daughter, and a domestic employee. According to the newspaper Crónica, the bodies of Meléndez and his wife were bound, the girl had a gunshot wound to the head, and the employee had injuries to her back. A six-year-old boy survived the attack.

The following day, the Attorney General’s Office of the State of Mexico (FGJEM) arrested two men: Diego Sebastián Rosen and Gerardo “N”. Security Secretary Omar García Harfuch confirmed that one of the detainees was a business partner of one of the victims and allegedly used that relationship to enter the residence.

The business relationship between Rosen and Meléndez

According to La Nación, Rosen was a partner of Meléndez in a travel company called NOMAD Adventures, which offered “extraordinary escapes” in Mexico. The company had a website promising “adventures that break the ordinary.” Additionally, Rosen had been reported for fraud: several people claimed to have paid for services they never received, totaling 400,000 Mexican pesos.

One of the complainants, in statements to Radio Fórmula, recounted that her family had contracted a trip to Acapulco to celebrate her grandfather’s birthday and were defrauded. She also pointed to Rosen’s wife, Paola Mandri, as part of the operation, although there are no formal charges against her in the consulted sources.

Security cameras and capture

A video released by Mexican media shows Rosen minutes before the crime in the elevator of Meléndez’s building. In the images, lasting nearly 30 seconds, he is seen wearing a cap, dark glasses, and a backpack. Before leaving the elevator, he stares directly at the camera. La Nación and Crónica agree on the description of the images, though they do not specify the exact time.

García Harfuch highlighted that the suspects were located in less than 24 hours, indicating a rapid investigation. Both were placed at the disposal of the justice system.

Timeline of events

1. Tuesday, September 2: The multiple murder occurs at Meléndez’s residence in Atizapán. The bodies are found that same day.
2. Wednesday, September 3: The FGJEM arrests Diego Rosen and Gerardo “N”. The elevator video is released.
3. After the arrest: Fraud victims report Rosen to the media, providing background on his actions.
4. Ongoing: The Prosecutor’s Office continues the investigation to determine the motive and possible involvement of other people, such as Rosen’s wife.

Value module: Amount defrauded by NOMAD Adventures

According to anonymous complaints collected by Radio Fórmula and cited by La Nación, Rosen allegedly kept 400,000 Mexican pesos from people who paid for services not rendered. This amount is a sum of individual complaints, not an official figure from the prosecutor’s office. No conversion to other currencies was made because the exchange rate for the Mexican peso on the date of the events is not available.

• Document: Anonymous complaints broadcast by Radio Fórmula.
• Organization and date: Radio Fórmula, after September 3, 2026.
• Unit: Mexican pesos.
• Values used: 400,000 Mexican pesos.
• Operation: Sum of amounts reported by different victims, as reported by the media outlet.

What to follow

It is relevant to follow the evolution of the FGJEM investigation to determine if there are other involved parties, especially the possible participation of Paola Mandri, mentioned by a complainant. It will also be important to learn the results of forensic analyses of the cameras and testimonies from the surviving child, which could provide clues about the motive for the crime.