[3][4] His family descends from Dionisio Puch, a soldier who was governor of the Salta Province, and Martín Miguel de Güemes, a military leader who defended the nation during the War of Independence.

[2] In 1956, when Robledo Puch was four years old, his parents moved the family to Borges Street, Olivos, Buenos Aires Province, where they rented a first-floor apartment above a hardware store.

[6] His father eventually divorced Puch's mother and was expelled from his job due to ostracization for his son's actions.

[6] In December 1968, Puch had his first legal encounter when he entered the workshop of a man who worked with bicycles and stole a motorcycle.

In early 1971, Puch and Ibáñez committed at least four robberies, stealing millions of pesos and spending them on luxurious items for themselves.

He then stole more than five million pesos and drank a whole bottle of whiskey with Ibáñez at the crime scene as a celebration for their success.

Ibáñez then ordered the woman to exit the car and Puch followed her, shooting her multiple times in the back, killing her.

Before fleeing, Puch shot and killed the sleeping watchman, who had raised his concerns in regards to the deaths of other watchmen in the area.

[8][9][10] Puch committed his last murder on 3 February 1972, when, along with Somoza, he broke into a hardware store in Tigre, Buenos Aires.

[12] Puch blamed his first accomplice Ibáñez for many of the crimes and stood defiant in court, where he referred to the whole process as a "farce.

Prior and during the process, a forensic psychiatrist named Osvaldo Raffo, determined that Puch was a psychopath who represented a threat to society.

The only survivor (eyewitness), who did not appear or testify in court for health reasons, said that the man who had raped and shot her had long hair, which indicated Ibáñez.

[18] In 2003, Puch was briefly transferred to a psychiatric hospital, where he was evaluated after he dressed as Batman and set fire to the workshop of the prison where he was serving his sentence in Olavarría.

[20]In November 2013, he requested a review of his sentence or, failing that, his execution by lethal injection, even though the death penalty was not legal in Argentina.

[21] On 27 March 2015, the Supreme Court of Justice rejected an appeal filed by Robledo Puch against the aforementioned judicial decision whereby he was denied parole.

[22] In May 2019, Puch was rushed to a hospital from prison after he showed signs of intoxication related to side effects of a medication aimed at treating depression.

"[25] Judge Quintana also rejected the transfer to a nursing home, saying that Puch refuses psychiatric treatment, and that he has not worked since 1992.

[26] In November 2024, judge Quintana offered Puch the possibility of having more relaxed prison conditions, which included going outside the penitentiary for a few hours.

The psychologists found Puch as suffering from a psychopathic personality disorder, with a significant omnipotence of narcissism, as well as exacerbated self-value, lack of empathy, large amounts of rage, emotional superficiality, impulsivity, absence of introspection, repressed emotionality, megalomaniac ideation, paranoia and lack of self-control.

Mental health professionals, which included a psychiatrist and a psychologist specialized in cognitive behavioral therapy, determined that Puch denies responsibility for his crimes, only confessing to his robberies.

They also found Puch to be "psychopathic, manipulating, cruel and perverse", as well as a person who constantly refers to God to justify his current situation, and to continue to hold others responsible for his problems, including the attempted suicide of his mother, which he blamed on reporters.