The investigation into the death of a Swiss police diver during an underwater operation near a hydroelectric facility could be reopened after new questions emerged about how the original inquiry was handled.
The case centres on the death of a 44-year-old diver from Zurich cantonal police who was killed during a search operation in the Limmat River near Dietikon, Switzerland, in September 2025. According to reporting by Swiss newspaper Blick, prosecutors are now considering appointing an external state prosecutor to independently review the incident and determine whether the case should be formally reopened.
The diver was reportedly taking part in a search operation close to a hydroelectric power station when he became trapped by an extremely powerful underwater suction current. Reports state he was pulled into a narrow intake opening beneath the surface, leaving fellow police divers unable to free him despite immediate rescue attempts.
The incident shocked Switzerland’s diving and emergency services community. According to Swiss media, it marked the first line-of-duty death involving Zurich cantonal police since 1979.
Initial investigations reportedly concluded the diver’s death was a tragic accident. However, recent reporting from both Blick and Swiss outlet Tages-Anzeiger has raised concerns over whether the original inquiry fully examined the circumstances surrounding the operation.
Among the concerns reportedly being reviewed are whether investigators obtained sufficient expert analysis, whether employees connected to the hydroelectric facility were interviewed, and whether operational divers had been fully informed about the dangerous underwater intake structure before entering the water.
One particularly alarming detail emerging from the reports is the estimated force of the underwater suction involved. Experts cited in the Swiss coverage reportedly calculated the force at approximately 350 kilograms, suggesting escape may have been physically impossible once the diver became trapped.
The case has also drawn attention to the often-overlooked hazards associated with diving operations around industrial water infrastructure. Hydroelectric stations, dams, flood control systems, and submerged intake structures can create deadly underwater currents that are difficult to detect from the surface and nearly impossible to overcome once a diver enters the affected zone.
Public safety divers routinely operate in some of the most hazardous underwater environments imaginable, often with limited visibility, strong currents, entanglement risks, and time pressure during rescue or recovery operations. Incidents involving underwater suction and entrapment remain relatively rare, but when they occur, survival chances are often extremely low.
Swiss prosecutors have not announced any findings of wrongdoing, and the review process appears to be focused on determining whether the original investigation was sufficiently comprehensive. The appointment of an external prosecutor from another canton is reportedly intended to ensure neutrality and public confidence in the process.
For the wider diving industry, the case serves as another stark reminder of the risks associated with operational and public safety diving, particularly in environments involving man-made water infrastructure and hidden hydraulic hazards.
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