At the time of the crime, Galarza was a law student at Universidad de Concepción del Uruguay[5] and played field hockey, which may have influenced in the case, turning her aggressive.

[6] Both Galarza and the victim, Fernando Gabriel Pastorizzo, lived in Gualeguaychú, a city with a population of around 100,000 inhabitants located 25 km (15.5 mi) west of the border with Uruguay.

Pieces of evidence such as text messages, Twitter posts, testimonies and others[11] suggest that it was full of violence, fights, and temporary reconciliations.

[18][19][20] In footage obtained by police from a private security camera, a person physically similar to Galarza is seen walking around 5:22 a.m. some six blocks away from the location of Pastorizzo's murder.

[24] On 3 July 2018, Nahir Galarza was declared guilty of aggravated murder (which means her crime was considered more serious because she was in a stable relationship with the victim) and condemned to life imprisonment.

[1][25] Even though the court rejected aggravations for firearm usage and cheating that were proposed by the prosecution, this sentence means that Galarza would effectively have to serve at least 35 years in prison.

[25] On 4 September 2018, it was announced that Galarza would be transferred to a common women's penitentiary, Unidad Penal 6 de Paraná, after staying the longest time allowed by law under custody in a police station (eight months).

[32][33] In March 2020, the Supreme Justice Court of Entre Ríos rejected another appeal to revert Nahir Galarza's life imprisonment.

Her Instagram account was terminated after her imprisonment, but came back twelve days later on Tuesday, 10 January, with some changes such as blurred photos and some profiles unfollowed.

[42] On 2 January 2018, a demonstration took place in front of Gualeguaychú's courts, with hundreds of people holding signs and pictures of the victim, Fernando Pastorizzo, protesting against the supposedly privileged conditions under which Nahir Galarza found herself.

[43][44] On 3 January 2018, the day in which Pastorizzo would turn 21, friends and family members published a supporting message and photographs of him with memories, asking for justice and repudiating Galarza's crime.

This group speaks about "hetero-patriarchal violence" and "hegemonic feminism" and asserted that "in the last six months Nahir Galarza has suffered a true witch hunt led by communication means, the judiciary and the commonly called public opinion".