Pre-trial detention in Austria: what it is, how it unfolds, who can decide what

Pre-trial detention is the court-ordered custody of an accused person in order to secure ongoing criminal proceedings. It is fundamentally different from imprisonment after conviction. Imprisonment is the execution of a final custodial sentence after a conviction. Pre-trial detention, by contrast, is imposed on a person against whom no final judgment has yet been handed down, and who is presumed innocent until a final conviction. Precisely for this reason the requirements are strict: section 173 paragraph 1 StPO requires both a strong suspicion of a criminal offence and a specific ground for detention under section 173 paragraph 2 StPO. If either is missing, the detention is unlawful.

According to the case-law of the Austrian Supreme Court, a strong suspicion requires a higher degree of probability that the accused has committed the offences with which they are charged (OGH 12 Os 12/07t). The incriminating indicators must outweigh the exculpatory circumstances. Circumstantial evidence is sufficient where, taken together, it provides a logically and empirically sustainable basis for the assumption of perpetration. The court must set out this assessment in the reasoning of the detention order; the mere possibility of perpetration is not enough.

In addition, the principle of proportionality under sections 5 and 173 paragraph 1 last sentence StPO applies. Pre-trial detention is ultima ratio: it may be imposed only where the purpose of detention cannot equally be achieved by a less restrictive measure, such as a reporting obligation, deposit of passport or bail. The duration of the detention must also not be disproportionate to the significance of the case or to the expected sentence. Proportionality must be examined separately at each detention decision, not only at the first imposition. The longer the detention lasts, the stricter the standard becomes.

For particularly serious felonies threatened with a minimum sentence of ten years of imprisonment, classically murder under section 75 of the Criminal Code, section 173 paragraph 6 StPO provides for a conditionally mandatory pre-trial detention: it must be imposed unless all grounds for detention can be ruled out with a probability bordering on certainty. Even in those cases, detention may be substituted by less restrictive measures. This provision does not apply to juveniles and young adults under sections 35 paragraph 1b and 46a paragraph 2 of the Juvenile Court Act (JGG).

The statute lists four grounds for detention exhaustively. Each one must be supported by specific facts and reasoned concretely, in relation to the specific offence and the specific person; generic arguments based on the abstract gravity of the charge are not enough. It is enough for a single ground to be made out concretely; conversely, the disappearance of just one previously decisive ground can justify release, provided the remaining grounds are not strong enough on their own.

Risk of flight (section 173 paragraph 2 number 1 StPO). Applies when specific facts give rise to the assumption that the accused will evade the proceedings by flight or going into hiding. Classic indicators are a concrete connection abroad, the absence of family and professional ties at home and a concretely threatened long prison sentence. The expected sentence alone is never enough; objective indicators such as prepared flight actions or documented contacts abroad must also be present. For less serious cases, section 173 paragraph 3 StPO reverses the assumption: where the threatened sentence does not exceed five years of imprisonment and the accused has settled living conditions and a fixed domestic residence, there is a statutory presumption against the risk of flight, which can only be rebutted by concrete preparations for flight, such as the purchase of a plane ticket.

Risk of obstruction (section 173 paragraph 2 number 2 StPO). The risk that the accused will destroy, alter or remove evidence, influence witnesses or co-defendants, or remove traces. This is the typical ground for detention in the early investigation phase. Once the key witnesses have been heard and the electronic evidence has been secured, there is simply nothing left to obstruct, and accordingly the maximum duration on the sole basis of risk of obstruction is short (two months, section 178 paragraph 1 number 1 StPO). According to settled case-law, denial or silence by the accused does not constitute a ground for detention (OGH 12 Os 7/10m); the right to remain silent under sections 7 paragraph 2 and 49 number 4 StPO may not be held against them.

Risk of repetition (section 173 paragraph 2 number 3 StPO). The concern that the accused, if at liberty, will commit further criminal offences with more than minor consequences which are directed against the same legal interest or follow the same harmful inclination. The ground requires a concrete prognosis, not a generic assumption. Previous convictions alone are not enough; the court must set out why, in the current situation in particular, the risk of repetition is sustainable.

Risk of carrying out an announced offence (section 173 paragraph 2 number 4 StPO). The risk that the accused will actually carry out a specific offence with serious consequences that they have already announced or threatened. The ground therefore presupposes a specific offence already foreshadowed, typically a serious threat against a specific person.

Pre-trial detention in Austria follows a clearly regulated procedural path. In the great majority of cases it begins with arrest by the police, either on application of the public prosecutor on the basis of a judicial arrest order under section 171 StPO, or directly by the criminal police under section 170 StPO where there is imminent danger. The arrested person must be delivered to a prison facility within forty-eight hours and presented there to the detention judge within a further forty-eight hours; the judge decides on the imposition of pre-trial detention.

Before this decision comes the mandatory hearing under section 174 paragraph 1 StPO: the detention judge questions the accused personally about the offence, the strong suspicion and the grounds for detention asserted, informs them of the charge and hears the defense lawyer, who has the right to attend. Already at this stage a less restrictive measure can be applied for, reporting obligation, deposit of travel documents, residence requirement. The order at the end of the mandatory hearing has three possible outcomes: imposition of pre-trial detention, ordering of less restrictive measures, or release. The order is pronounced orally; the written version must be served within twenty-four hours.

If pre-trial detention is imposed, the first detention review hearing under section 175 paragraph 2 StPO follows. It takes place no later than fourteen days after the imposition of detention. There, the court examines for the first time in an oral hearing whether the strong suspicion and the ground for detention persist and whether detention is still proportionate. Four outcomes are possible: continuation of detention, change of the grounds for detention, lifting of detention, or replacement by a less restrictive measure. The detention appeal to the Higher Regional Court is open against the order; at the first imposition it must be filed within fourteen days of service of the written detention order, which is served no later than twenty-four hours after pronouncement (sections 87, 88 StPO). For orders on continuation or lifting issued at later detention review hearings, a shorter deadline of three days from pronouncement applies (section 176 paragraph 5 StPO).

After this the periodic detention review follows under section 175 paragraph 2 StPO on a graduated schedule: the second hearing one month after the first, thereafter every two months. These deadlines are mandatory. If a detention review is not carried out on time, the accused must be released immediately. The court re-examines at every detention review hearing, and is not bound by the reasoning of the previous hearing. The defense can present new evidence, changed living circumstances or an improved substitution package at every hearing.

With the indictment, jurisdiction over the detention review passes to the trial court. The fixed detention review intervals of section 175 paragraph 2 StPO no longer apply; a detention review hearing only takes place on application of the accused or of the public prosecutor (section 175 paragraph 5 StPO). With the final judgment, pre-trial detention ends either through an acquittal (immediate release), through a conviction with credit for time spent in pre-trial detention against the sentence, or through credit for time spent in pre-trial detention against a conditionally suspended sentence.

A person in pre-trial detention is not without rights. The central guarantees form a bundle of statutory rights and constitutional protections that become particularly tangible in the detention setting.

Access to the file under section 51 StPO. In principle from the time of being formally treated as an accused. Before the first detention review hearing there is a mandatory right of access to those parts of the file that support the detention, the arrest order, the description of the strong suspicion, and the evidence relating to the assumed grounds for detention (section 51 paragraph 2 StPO). A blanket refusal on grounds of investigation tactics is impermissible.

Right to defense counsel (section 49 number 2 StPO, Article 6 paragraph 3 letter c ECHR). In pre-trial detention even mandatory defense under section 61 paragraph 1 number 2 StPO, the accused must be defended throughout the entire duration of detention. Anyone who cannot afford private defense receives a legal aid lawyer paid for by the federal budget.

Unmonitored contact with the defense lawyer (section 59 StPO). Oral visits, written correspondence and telephone calls may not be monitored in substance as a rule. Defense correspondence is exempt from the general letter check (section 59 paragraph 1 StPO); the marker "defense correspondence" is customary.

Right to remain silent (section 49 number 4 in connection with section 7 StPO). The accused need not contribute to their own incrimination. A statement made without a prepared defense is as a rule a strategic mistake, because every answer can go into the file and from there into the trial.

Duty to inform (section 50 StPO) and interpreter (section 56 StPO). The accused must be informed about the charge and their rights in a language they understand. Anyone who does not have sufficient command of the language of the proceedings has a right to an interpreter, at the mandatory hearing and at the detention review hearing.

Information of a relative or person of trust. After arrest, the accused may have a relative or person of trust informed (section 171 paragraph 1 StPO). This notification is the practical precondition that allows a family to instruct defense counsel and gather evidence at all.

Personal liberty as a fundamental right (Article 5 ECHR, PersFrSchG). Every hour of deprivation of liberty without a final conviction requires justification. That justification does not stretch indefinitely: the detention is time-limited (section 178 StPO), subject to periodic review (section 175 StPO) and must be lifted immediately if the grounds no longer apply.

Pre-trial detention is always time-limited. Section 178 paragraph 1 StPO sets out maximum durations along two criteria: the ground for detention asserted and the gravity of the alleged offence. The more serious both, the longer the detention may last.

The graduation looks like this in practice: two months, where detention is based exclusively on risk of obstruction; six months for misdemeanours; one year for felonies; two years for felonies threatened with more than five years of imprisonment. These maximum durations apply up to the beginning of the main trial; thereafter, the further detention is subject only to the standard of proportionality, fixed ceilings no longer apply.

Continuation beyond six months is permitted under section 178 paragraph 2 StPO only if particular difficulties or a particular scope of the investigation require it and the weight of the grounds for detention supports it. According to settled case-law, the mere absence of a confession does not qualify as a particular difficulty. If the maximum duration is exceeded, release is mandatory; a renewed imposition of detention is possible under section 178 paragraph 3 StPO only for the main trial and for no more than six weeks.

Alongside the fixed maximum durations stands the acceleration principle, legally anchored in section 9 paragraph 2 StPO, section 177 paragraph 1 StPO and Article 5 paragraph 3 ECHR. It obliges the prosecution and the court to conduct proceedings with detained accused with particular speed, and its effect is progressive: the longer the detention lasts, the stricter the standard becomes. If the investigation is delayed without good reason, the delay alone can support release, even if the strong suspicion and the ground for detention formally still apply. In defense practice this lever is at times more effective than the debate over the grounds for detention themselves, because delays can be evidenced from the file.

The first seventy-two hours after an arrest determine the further course. Four steps stand out as the most important, and they can also be prepared by relatives before defense counsel sees the file for the first time.

First: brief defense counsel. In urgent detention cases a written instruction by relatives is sufficient; counsel obtains the signed power of attorney at the first visit to the prison. Being reachable by telephone is more important here than a formally perfect power of attorney.

Second: gather evidence. Registration of residence, employment or apprenticeship contract with a current employer confirmation, school or study confirmation, where applicable medical reports, a short written statement from close relatives on family ties. This evidence is the material with which defense counsel can apply for less restrictive measures at the mandatory hearing or, at the latest, at the first detention review hearing.

Third: keep the social network available. Anyone who can carry conditions as a relative or person of trust, accepting the accused into their home, accompanying them to therapy appointments, providing bail, should declare this in writing and be prepared, where appropriate, to appear at the hearing in person. Concrete commitments carry more weight than general statements of readiness.

Fourth: discipline in communication. Telephone calls and letters with the person in custody only with the awareness that calls and ordinary post in pre-trial detention may be monitored. Defense correspondence is exempt from monitoring (section 59 paragraph 1 StPO); family correspondence is not. Sensitive topics, the charge, evidence, defense strategy, belong in the protected communication with the defense lawyer, not in letters or calls that may be read or overheard.