The remaining three (Lucas Pertossi, Blas Cinalli and Ayrton Viollaz) were declared "secondary participants" and sentenced to 15 years in prison.

Upon graduating from high school, Báez Sosa enrolled at the University of Buenos Aires to study law.

[21][22][23] During the murder trial, the eleventh youth was identified as Tomás Collazo; his identity had been previously kept hidden as he had been 17 years old (and therefore, a minor) at the time of the attack.

[25] Báez Sosa arrived at Villa Gesell, a popular summer destination in the Buenos Aires Atlantic coast, on Thursday, 16 January 2020.

Báez Sosa's group stayed at the Hola Ola hostel on Paseo 105 and Avenida 5, in downtown Villa Gesell, where they intended to remain until 23 January.

By 4:30 a.m. the venue was overcrowded, leading one of Fernando's friends to unwittingly bump against one of the attackers, which gave way to a verbal discussion between the two groups.

[34] A selfie showing eight of them smiling at the camera taken only 20 minutes after the beating was extensively shared on social media;[36] as well as group chat conversations in which Lucas Pertossi referred to Báez Sosa as having "expired".

The prosecutor's office gathered evidence from security cameras, witnesses, and the group's rented apartment, where the blood-stained clothes were found.

The transgressors' cellphones were also confiscated and sent to Mar del Plata for analysis, which led to the direct video recordings for the beating.

[38][39] Báez Sosa's autopsy found he had succumbed to neurogenic shock, leading to internal bleeding from multiple hits.

This made it difficult for the prosecutor's office to pinpoint whose specific hit provoked Báez Sosa's death.

[7][8] After being detained by provincial police in the aftermath of Báez Sosa's murder, the accused pointed the blame for his death at Pablo Ventura, a 21-year old rower from Zárate and acquaintance of the group.

[51] Further inspection on the offenders' cellphones found memes and insults targeting Ventura, suggesting a prior animosity from the group toward him.

[64][65] Báez Sosa's parents received messages of condolences from Pope Francis and President of Argentina Alberto Fernández, among others.

On 18 February 2020, a month after the murder, Báez Sosa's parents called for a nationwide demonstration with its epicenter at the plaza by the Congressional Palace in Buenos Aires.

[74] For the occasion of the third anniversary of the murder, on 19 January 2023, Sosa led an "interfaith prayer" in her son's memory in Dolores, the site of the trial.

[75] Several prominent people in Argentina have spoken out asking for justice for Báez Sosa's murder, such as national football team players Leandro Paredes and Pity Martínez.