Diogo Alves

Scott Simon

2 min read

·

10-01-2025

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Diogo Alves, a name that chills the spine even today, represents one of the most prolific and terrifying serial killers in 19th-century Portugal. His reign of terror, centered around the Alcântara Aqueduct in Lisbon, left a lasting scar on the nation's psyche and contributed significantly to the development of forensic science in Portugal.

A Life of Crime and Deception

Born in 1810, little is definitively known about Alves' early life. However, accounts paint a picture of a man already predisposed to violence and deceit. He was a skilled stone mason, a profession that provided him with access to the secluded areas of the aqueduct, his eventual killing ground. While working there, he began his gruesome spree, targeting unsuspecting individuals who crossed his path.

The Alcântara Aqueduct Murders: A Reign of Terror

Alves' modus operandi was brutal and chilling. He would lure his victims, primarily travelers and those seeking to cross the aqueduct, before pushing them to their deaths into the ravine below. The height and rugged terrain ensured that the bodies were often badly damaged, making identification incredibly difficult for authorities at the time.

The sheer number of deaths directly attributed to Alves is still debated by historians, with estimates ranging from 60 to over 100 victims. This staggering number cemented his reputation as one of history's most prolific serial killers. His crimes remained unsolved for years, fueling fear and speculation amongst the populace.

Capture and Execution

Alves’ reign of terror finally ended with his eventual arrest in 1840. While the precise circumstances leading to his capture remain unclear, the fact remains that his ruthless actions eventually caught up with him. The subsequent trial that followed, however, was deeply flawed by the lack of robust investigative techniques and judicial processes available at that time.

Despite this, he was convicted and sentenced to death by hanging. His execution was a significant public event, underscoring the horror and widespread impact his crimes had on Portuguese society.

Legacy and Impact

Diogo Alves’ legacy extends beyond his brutal killings. His crimes spurred significant advancements in forensic science and investigative techniques in Portugal. The need to identify bodies and establish a clearer chain of evidence led to improvements in forensic practices, leaving a grim, yet undeniable impact on the development of criminal justice within the country. His name serves as a chilling reminder of the depravity of human nature and the vital importance of effective law enforcement and forensic advancements.

Note: Accounts of Alves' life and crimes vary depending on the source. This article presents a general overview based on widely accepted historical information.