Accused person: clarify allegation and file first.
Do not give a spontaneous explanation before the allegation, file position and evidence are known. From a lawyer’s perspective, defence starts with file access and a reliable chronology.
Appeals
Bias in criminal proceedings: challenging a judge, prosecutor or expert
Bias in Austrian criminal proceedings: exclusion, challenge of judge, prosecutor or expert and first procedural steps.
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Mag. Christopher Angerer, Rechtsanwalt
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23 August 2026 · Mag. Christopher Angerer, Rechtsanwalt
Bias in criminal proceedings is more than an uneasy feeling. Anyone who wants to challenge a judge, prosecutor or expert needs concrete circumstances, a clear file position and the correct procedural route.
This article explains from a lawyer’s perspective when bias is assessed, how exclusion and challenge differ and why general accusations against the court usually harm the defence.
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Quick assessment
Which question should be clarified first?
The first reaction depends on whether there is already a summons, a seizure or only an initial suspicion.
Already know that you want to send an inquiry? Go directly to the inquiry form.
Which situation fits best?
This assessment does not replace file access. It only helps to sort the first step.
All paths at a glance
Overview of all answers.
Prepare file access →
Business role: do not accept responsibility too early.
In a business, technical access, management responsibility and actual decision making may be separate. Roles, approvals and documentation routes must be reviewed separately.
Evidence: preserve original state and records.
If data, devices or documents have already been secured, records, copies, timing and scope matter. Only then can a remedy or statement be assessed.
Urgent situation: take the appointment seriously and stay calm.
A summons or official deadline is not a reason for improvised explanations. First check status, addressee and legal consequence of the letter.
Separate bias, exclusion and challenge
Separate bias, exclusion and challenge
In criminal proceedings, it must be distinguished whether a person is legally excluded or whether concrete reasons suggest bias. This distinction affects application, reasoning and further steps.
A merely unfavourable impression is not enough. Reviewable circumstances are required, such as prior involvement, closeness to parties, special statements or conduct that can objectively create doubt.
Defence must formulate the issue precisely. General attacks on the court often make the position worse.
Challenging a judge or prosecutor in criminal proceedings
Challenging a judge or prosecutor in criminal proceedings
For judges, the question is whether the person can decide impartially. For prosecutors, the focus is the objective conduct of the investigation.
The correct route depends on the stage of proceedings and the organ concerned. Orders, records and previous procedural steps should therefore be organised first.
If court orders already exist, the article on complaints against court orders may also be relevant.
Distinguish expert bias from professional criticism
Distinguish expert bias from professional criticism
With experts, bias must be separated from professional inaccuracy. Not every implausible opinion shows bias. Sometimes supplementary questions or examination of the expert are the better route.
The article on expert opinions deals with plausibility review. This article concerns formal challenge based on concrete circumstances.
Early documentation, precise quotations and a clear link to the proceedings are important.
Strategy: application, reasoning and file position
Strategy: application, reasoning and file position
A bias application does not have to be loud, but precise. The key question is which objective circumstances justify doubt and how they are proven in the file.
Before filing, assess whether file access, correction of the record, evidence motion or a remedy is the better first step. Not every problem is solved through bias.
From a lawyer’s perspective, the aim is to make a procedural error usable without damaging the credibility of the defence.
Overview
Review points in bias issues
Quick assessment
| Point | Meaning | First question |
|---|---|---|
| Person | organ concerned | Who is to be challenged? |
| Reason | concrete circumstance | What can be proven? |
| Timing | stage of proceedings | When was it known? |
| Consequence | application or other route | Which step fits? |
Important: Do not make general accusations. Bias requires concrete facts and clean evidence.
Frequently asked questions
Bias in criminal proceedings: key questions.
Is a bad feeling enough for bias? +
No. Concrete and objectively understandable circumstances are decisive, not mere dissatisfaction.
Is a wrong expert opinion automatically biased? +
No. Professional criticism and bias must be separated. Supplementary questions or an evidence motion may be more useful first.
When should the application be filed? +
As soon as the relevant circumstances are known and can be proven cleanly. The exact step depends on the stage of proceedings.
Related topics
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Topics
biascriminal proceedingsjudgeprosecutorexpertStPO
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