Andrea Matteucci, known as "The Monster of Aosta" (Il Mostro di Aosta), was born on April 24, 1962, in Turin, Italy. His early life was marked by instability and abandonment. His father, a worker with a criminal record, left the family the year Andrea was born. His mother, Maria Pandiscia, sent him to live with her sister in Foggia before later moving him to Aosta, where he spent part of his childhood in a religious institute until the age of nine.

Matteucci harbored deep resentment towards his mother, claiming that she worked as a prostitute and exposed him to her clients. This fueled his hatred toward women, particularly those involved in sex work. At 14 years old, he attempted to rob the butcher shop where he worked but later confessed to the crime. He spent the next four years in a rehabilitation community before leaving at 18 to work as a mechanic in Quart.

In 1983, after completing military service in the Folgore Paratroopers Brigade, he married and settled in Villeneuve, Aosta. He worked various jobs, including as a shop assistant and stonemason, but struggled with violent tendencies and an unstable personality. By 1987, his marriage had begun to deteriorate, and his criminal urges resurfaced.

Andrea Matteucci committed four brutal murders between 1980 and 1995, targeting men and prostitutes, whom he killed in fits of rage, sexual frustration, or personal vengeance.

His first known murder occurred on April 30, 1980, when 18-year-old Matteucci stabbed and killed merchant Domenico Raso near the Roman Theatre of Aosta. Matteucci claimed that Raso had made unwanted sexual advances, which he saw as a betrayal of Raso’s wife and children. This distorted moral code—that men who engaged in extramarital sex deserved to die—became a theme in his later crimes. After this killing, Matteucci evaded detection and left for military service, effectively disappearing from law enforcement's radar.

In 1992, Matteucci resumed his violent spree. He picked up Turin prostitute Daniela Zago in Brissogne and took her to a secluded area. During sex, an argument erupted, and in a rage-fueled attack, Matteucci shot her in the head. However, Zago survived the first shot and begged him to take her to the hospital. Instead, he pretended to help, only to execute her with a second gunshot before burying her body in Arvier. A month later, fearing discovery, he dug up her remains and burned them in a landfill to cover his tracks.

In 1994, Matteucci picked up Nigerian prostitute Clara Omoregbee in Chambave and took her to Arnad. After an unsatisfactory sexual encounter, he became enraged, punched her, and then shot her in the head. Not satisfied with simply killing her, he engaged in necrophilia, sexually assaulting her corpse. He later dismembered her body, burned the remains, and disposed of them in the Dora Baltea River near Villeneuve.

On September 10, 1994, he lured another prostitute, Lucy Omon, and attempted to strangle her with a pillow and a rag. However, she managed to escape, surviving what could have been another murder.

His final known victim was 23-year-old Albanian prostitute Albana Dakovi, whom he murdered on May 12, 1995. After a violent sexual encounter, he attacked her with a wrench and stabbed her to death in Arnad. He then hid her body in his van and, despite being under judicial supervision for a separate crime, drove to Saint-Pierre to sign his name in a court registry—while the corpse remained inside the vehicle. Afterward, he burned the body to dispose of the evidence.

A breakthrough came when Dakovi’s pimp reported seeing her enter an Iveco Daily van. The police tracked the license plate and arrested Matteucci on June 26, 1995. At first, he denied involvement, but under interrogation, he confessed not only to Dakovi’s murder but also to the three other killings.

During his trial, psychiatrists determined he was socially dangerous but partially aware of his actions, leading to a reduced sentence. On April 16, 1996, he was sentenced to 28 years in prison and three years in a psychiatric hospital.

Matteucci was released from prison in March 2017 at the age of 55 and transferred to a psychiatric health facility, where he remains under constant supervision. His case stands as one of the most disturbing in Italian criminal history, characterized by brutality, necrophilia, and a deep-seated hatred of women.