15-Year-Old Boy Arrested in Portugal for Allegedly Killing His Mother

Avenida Ivens Tragedy: 15-Year-Old Detained After Mother’s Death in Algés

A quiet residential street in Algés, located within the municipality of Oeiras just outside Lisbon, became the center of a grim criminal investigation after a 15-year-old boy was detained by the Polícia de Segurança Pública (PSP) on suspicion of killing his 33-year-old mother. According to official police statements reported by outlets such as O Minho, the juvenile allegedly attacked the victim during a domestic dispute, utilizing a dangerous martial arts maneuver known as a “mata-leão” (rear-naked choke) to cause her death.

The harrowing timeline emerged as law enforcement pieced together the sequence of events following the emergency call. Investigators confirmed that the tragic incident stemmed from an initial argument on a Wednesday on Avenida Ivens. Rather than seeking immediate help, the teenager remained inside the apartment with the victim’s body for days, sharing the living space with his four-year-old sister—who is also the victim’s daughter—before finally alerting authorities late in the afternoon.

Emergency Response and the PJ Takeover

Emergency services and police units arrived at the residence following the 17:35 alert placed by the suspect. Initial findings by responding officers corroborated that the 33-year-old woman had been deceased inside the home since Wednesday. While the PSP initially secured the scene and took the adolescent into custody, the gravity and nature of the crime necessitated the immediate handover of the case to Portugal’s specialized investigative branch, the Polícia Judiciária (PJ).

Child Welfare and Forensic Evidence Gathering

The presence of the four-year-old child inside the apartment throughout the ordeal has added a profound layer of tragedy to an already devastating case.

Photo: ominho.pt

Portuguese Legal Frameworks for Minors Under 16

Cases involving severe violent crimes committed by minors under the age of 16 present complex challenges within the Portuguese legal and judicial system.

The investigation remains active as authorities work to establish a comprehensive chronology of the dispute and the psychological state of the minor leading up to the fatal encounter.