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Netflix will release The Investigation of Lucy Letby on February 4, 2026, offering an in-depth look at one of Britain's most high-profile healthcare crimes. The documentary features exclusive footage from the neonatal nurse's arrest and police questioning, along with the first-ever testimony from a victim's family member in documentary format.

Despite references to a case known as 'Marina Erte-mordet' in Swedish-language podcasts and documentaries, verified English-language sources containing factual details about this matter remain unavailable through major international crime databases and news outlets.

On 25 July 2004, 18-year-old Brian Blackwell murdered his parents with a claw hammer and carving knife at their £350,000 bungalow near Liverpool. The crime remained undiscovered for six weeks, and Blackwell's subsequent confession revealed a chilling motive rooted in narcissistic rage.

In the spring of 1982, Johannes-Andreas Hanni began a killing spree across Harju County, Estonia that would claim three lives and shock the nation. The 25-year-old murderer, aided by his own wife, carried out a series of brutal attacks before his arrest in October that year.

Richard Kuklinski appeared to neighbors and relatives as a devoted husband and caring father in New Jersey during the 1970s and 1980s. Behind closed doors and in his secret life as a contract killer, he was a man of calculated violence—one of America's most prolific confessed murderers, responsible for at least five confirmed killings and allegedly over 100 others.