In a jarring example of how personal digital footprints can inadvertently serve as a roadmap for justice, the 2024 arrest of Spanish serial killer José Jurado Montilla has become the definitive case study in modern criminal investigation.
Known online as 'Dinamita Montilla,' the 64-year-old convict, who had previously served 28 years for four murders in the 1980s, successfully cultivated a benign social media persona, documenting his nomadic travels across Spain to thousands of unsuspecting followers onTikTok.However, the facade collapsed when Montilla became the prime suspect in the 2023 disappearance of 42-year-old Esther Estepa.
By meticulously geolocating the scenery, timestamps, and background landmarks within his own videos, Spanish authorities successfully circumvented his lack of a fixed address to pinpoint his movements, ultimately leading to his capture at a sports bar near the Spanish-Portuguese border.
Now, the subject of the gripping Netflix documentary series 'The TikTok Killer', which premiered on 6 March 2026, Montilla's case continues to serve as a stark reminder of how the very platforms used to curate a public image can become the most damning evidence against those attempting to hide a violent past.
Montilla, 64, first gained notoriety in Spain for a series of murders in the 1980s. He was convicted of killing four people, including tourists from the UK and Germany (1987), in the Málaga region and sentenced to a total of 123 years in prison.
However, in 2013, following a ruling by the European Court of Human Rights that overturned Spain's controversial Parot Doctrine, Montilla was released after serving around 28 years of his sentence.
Following his release, he adopted a seemingly benign online persona, creating a TikTok account under the handle 'Dinamita Montilla' where he chronicled his travels across Spain, shared hiking videos, and even proclaimed his innocence.
In August 2023, Montilla encountered 42‑year‑old Esther Estepa, a woman from Seville travelling through Spain. She vanished shortly after they met while hiking near the coast of Valencia. Esther's family became alarmed when they received unusual messages from her phone indicating she was moving abroad.
Montilla posted videos on TikTok, asking for help finding Esther, retracing their shared hiking routes, and appealing to his followers for information. These posts were ostensibly intended to raise awareness of her disappearance.
La Policía Nacional ha detenido a un asesino en serie gracias a seguirle la pista por los vídeos que subía él mismo a Tik-Tok.Se trata de José Jurado Montilla, en los años 80 cometió 4 asesinatos en Málaga, y se encontraba en libertad desde 2013. Ahora es sospechoso de asesinar...pic.twitter.com/PFh97o9Dql
Source: International Business Times UK
