Appeal against the refusal of a telephone surveillance measure by the TMC

Facts

The decision concerns an appeal against the refusal of the Tribunal of coercive measures (TMC) of the canton of Argovia to authorize a telephone surveillance measure in the context of a criminal investigation for armed robberies. The Staatsanwaltschaft Muri-Bremgarten had requested authorization to carry out an antenna search call (Antennensuchlauf) to identify the telephone numbers that had communicated with mobile phone antennas in the crime zone in Berikon (AG) during a period of two hours.

The TMC had refused this request, considering that there was no sufficient suspicion of a crime. The Staatsanwaltschaft then appealed this decision to the Federal Tribunal, requesting the annulment of the decision and the authorization of the surveillance measure.

Considerations

Introduction

The Federal Tribunal examined the admissibility of the appeal and considered that the TMC's decision was subject to appeal. The Staatsanwaltschaft had a protected interest in appealing the decision, as the refusal of the telephone surveillance measure could result in a significant loss of evidence for the investigation.

Conditions for admission of antenna field search

The Federal Tribunal examined the conditions for admission of the antenna field search in the context of a criminal investigation. It considered that the telephone surveillance measure was justified, as there was a sufficient suspicion of a crime and other means of investigation had failed. The telephone surveillance…