Matej Čurko was born on June 25, 1968, in Košice, Czechoslovakia. Raised primarily by his mother and grandmother after his parents' divorce, he exhibited signs of social withdrawal and emotional detachment from an early age. At 13, he attacked a younger neighbor with a knife, leading to psychiatric hospitalization. Despite this, he demonstrated above-average intelligence, particularly in technical fields.

As an adult, Čurko pursued a career in information technology and eventually became the head of the IT department at an insurance company. He married at the age of 30 and had two children. Colleagues and neighbors described him as reserved and unremarkable. However, psychological assessments later suggested he exhibited traits consistent with schizoid personality disorder and necrophilic sadism.

Between 2009 and 2011, Matej Čurko engaged in a series of online interactions on suicide forums under the pseudonym "Orion218." He targeted individuals expressing suicidal ideation, offering them a "painless death." His modus operandi involved meeting victims in secluded forest areas near Kysak, Slovakia, where he would administer sedatives before fatally stabbing them in the heart.

Investigations confirmed two victims: Elena Gudjaková, 30, who disappeared on June 23, 2010, and Lucia Uchnárová, 20, who went missing on September 3, 2010. Both women had documented mental health issues and had communicated with Čurko online. Their remains were discovered in shallow graves on Čurko's property, with evidence suggesting post-mortem dismemberment and cannibalism.

In 2011, a Swiss man named Markus Dubach contacted Slovak authorities after engaging in similar online correspondence with Čurko. An undercover operation was arranged, during which Čurko was shot by police after drawing a firearm. He succumbed to his injuries on May 12, 2011. Subsequent investigations linked him to additional disappearances, including that of an Italian woman, though these connections remain unconfirmed.