“Secreto de sumario” is a legal concept in the criminal justice system of Spain.

It refers to a situation where part or all of a criminal investigation file is placed under judicial secrecy/confidentialityduring the investigative stage (“fase de instrucción”).

In practical terms, it means:

• investigators continue working,
• but certain information is temporarily withheld,
• even from some parties involved in the case.

The investigating judge (“Juez de Instrucción”) may order this to:

• protect the investigation,
• prevent destruction of evidence,
• avoid witness interference,
• prevent suspects coordinating stories,
• or protect victims and sensitive evidence.

During a “secreto de sumario,” there may be restrictions on access to:

• forensic reports
• witness statements
• police findings
• phone or device evidence
• surveillance details

It does not automatically mean guilt or that something dramatic is happening.
It means the judge believes confidentiality is necessary for the integrity of the investigation.

In Spain, these secrecy orders are usually:

• limited in time,
• and subject to judicial control,
  though they can sometimes be extended in complex investigations.

For people connected to a case, this period can feel extremely frustrating because:

• information is limited,
• rumours spread,
• and there may be long periods of silence.

But legally, the purpose is to protect the process—not to punish before trial.