Rights of the Detainee in Spain

Rights of the detainee in Spain

Being detained is one of the moments of greatest vulnerability in a citizen’s life. In a matter of seconds, a person goes from moving freely to being under the custody of the State, surrounded by officers, in an unknown environment and with an enormous emotional burden. At that moment, the only thing that balances that situation of disadvantage is the knowledge of one’s own rights.

The Spanish legal system, through the Constitution, the Criminal Procedure Act, and European regulations incorporated into our domestic law, recognizes for every detained person a set of fundamental and inalienable rights that must be respected from the very first moment of detention. These rights are not a courtesy of the system: they are guarantees that the rule of law imposes on its own agents as a limit to the exercise of coercive power.

Knowing these rights in advance —not at the moment they are needed, but before— is one of the most intelligent precautionary measures any citizen can adopt. Because when the moment comes to exercise them, fear, confusion, and environmental pressure may cause someone who does not know them beforehand to be unable to claim them. In this article we explain them all, in detail and clearly, so that if you ever need them you know exactly what you are entitled to.

The constitutional foundation: freedom as the rule, detention as the exception

The starting point of all detainees’ rights is Article 17 of the Spanish Constitution, which enshrines the right to liberty and security as one of the most basic fundamental rights of the individual. This provision establishes that no one may be deprived of their liberty except in the cases and in the manner provided by law, and that preventive detention may not last longer than strictly necessary.

This principle —freedom as the rule and detention as a justified exception— is what structures the entire system of detainees’ rights. Detention is not an anticipated punishment nor a manifestation of the State’s power over the individual: it is a provisional measure, subject to time limits, conditions, and strict judicial controls, which can only be maintained while there are sufficient reasons to justify it and within the limits established by law.

Any detention that does not comply with these requirements, that extends beyond the legal time limits, or that is carried out in violation of the detainee’s rights is illegal and can be challenged legally, both through the habeas corpus procedure and through ordinary procedural remedies and, ultimately, before the Constitutional Court.

Right to be informed of the reasons for the detention

The first right that assists every detained person is the right to know immediately the reasons for their detention and the facts attributed to them. This right, recognized in Article 17.3 of the Constitution and developed by the Criminal Procedure Act, guarantees that no one can be deprived of liberty without knowing why.

The information provided must be understandable, precise, and in language accessible to the detainee. It is not enough to communicate the legal provision under which the detention is carried out: the officer must explain, in terms the detainee can understand, the specific facts that have led to the deprivation of liberty. If the detainee does not understand the language in which the information is given, they have the right to receive that information in their own language, through an interpreter if necessary.

The violation of this right —detaining someone without explaining the reasons— is not only illegal, but may determine the nullity of subsequent actions carried out during detention, including any statement made without knowing the charges attributed.

Right to remain silent and not to testify against oneself

It is, without doubt, one of the most well-known rights and at the same time one of the most misunderstood. The right to remain silent means that the detainee may refuse to answer any question put to them, whether during police questioning or before the investigating judge, without that refusal being interpreted as an indication of guilt or being used against them by the court.

This right is closely linked to the right not to testify against oneself and the right not to confess guilt, which are manifestations of the broader principle that prohibits the State from using the accused themselves as a source of evidence against them. No one can be forced to provide information that may incriminate them: that burden lies entirely with the prosecution.

In practice, exercising the right to silence is often the most intelligent decision at the moment of detention, especially when the detainee does not know exactly what they are accused of, when the situation is unclear, or when any explanation could be misinterpreted. Silence does not harm: speaking without a lawyer can.

It is important to emphasize that this right applies both before the police and before the judge. A detainee who makes a statement to the police and then remains silent before the judge, or vice versa, may see those attitudes contrasted by the prosecution. Therefore, the strategy on whether to make a statement or not and what to say at each moment should always be decided with the advice of a lawyer.

Right to legal assistance

The right to legal assistance is the most important guarantee of the entire system of detainees’ rights, because it is what makes all the others effective. Without a lawyer advising the detainee on their rights and accompanying them during questioning, the other rights may become meaningless.

This right unfolds in several dimensions:

Firstly, the right to freely appoint a lawyer of trust that the detainee considers most appropriate for their defense. The police are obliged to facilitate the means for the detainee to contact their chosen lawyer and to wait for their arrival before proceeding with any questioning.

Secondly, the right to free legal assistance for those who do not have sufficient financial resources to pay for a private lawyer. In these cases, the Bar Association will appoint a duty lawyer who must appear before any statement begins.

Thirdly, the right to a private interview with the lawyer before making a statement. This interview is confidential, must take place without officers being able to listen or record it, and aims to allow the lawyer to properly advise the detainee on how to act. No statement given without this prior interview has full validity.

Fourthly, the right for the lawyer to be present throughout the questioning, being able to object to questions they consider inappropriate, verify that the detainee understands what is being asked, and ensure that the statement is conducted with all legal guarantees.

Right to information in a language understood

The right to be informed of the reasons for detention and of the rights assisting the detainee must be exercised in a language the detainee understands. If the detainee is a foreigner or does not sufficiently understand Spanish, they have the right to the assistance of a free interpreter who translates both the information provided by the police and the content of their statement and any documents they are asked to sign.

This right, fully incorporated into Spanish law through European regulations, has enormous practical importance in a country with a significant foreign population. A statement given without real understanding of the questions, or signing a document whose content has not been understood, may later be challenged as invalid evidence.

The interpreter must act impartially and faithfully, limiting themselves to accurately conveying what is said in each language. If the detainee has doubts about the quality of the interpretation or suspects that the interpreter is distorting communication, they must inform their lawyer so that appropriate action can be taken.

Right to communicate the detention to a family member or trusted person

Every detained person has the right for their detention to be communicated immediately to a family member or person of their choice. This right has a dual purpose: on the one hand, to ensure that someone trusted by the detainee is aware of their situation and can activate the necessary mechanisms to help them; on the other hand, to act as a safeguard against possible abuses, since the publicity of detention makes unlawful treatment more difficult.

The communication may be carried out by telephone or any available means, and the police are obliged to facilitate it as soon as possible. However, it is important to bear in mind that these communications may be listened to or recorded, so the detainee should not discuss the case or the facts under investigation through these channels. The only communication that is fully confidential is that with the lawyer.

There is an exceptional situation in which this right may be limited: incommunicado detention, which can only be ordered by a judge in cases of terrorism or other particularly serious offenses and for a legally established maximum period. Even in this situation, the detainee retains the right to legal assistance, although the lawyer will be court-appointed and cannot be chosen by the detainee.

Right to medical assistance

The detainee has the right to receive appropriate medical assistance if their health condition requires it. This right must be guaranteed by the police from the very moment of detention and throughout the entire period of deprivation of liberty. If the detainee reports symptoms of illness, has suffered injuries prior to detention, or presents a condition requiring attention, the police are obliged to provide that care.

Medical assistance during detention does not only have a therapeutic purpose: it also serves a guarantee and control function. Medical examination at the beginning and end of detention makes it possible to verify whether the detainee has suffered any physical harm and serves as evidence if ill-treatment is alleged. Therefore, if the detainee has suffered any injury or physical discomfort during detention, they must inform their lawyer and request that medical evidence of those injuries be recorded.

The right to medical assistance also includes the right to receive previously prescribed medication, since detention cannot mean the interruption of necessary ongoing treatments.

Right not to be subjected to degrading treatment or torture

The absolute prohibition of torture and inhuman or degrading treatment is one of the most basic fundamental rights recognized both by the Spanish Constitution —Article 15— and by international human rights conventions ratified by Spain, especially the European Convention on Human Rights. This prohibition is absolute and non-derogable: it admits no exceptions, not even in states of emergency or when investigating particularly serious crimes.

Torture and inhuman or degrading treatment are not limited to physical violence: they also include psychological coercion, threats, deprivation of sleep or food, exposure to humiliating conditions, and any other form of mistreatment that violates the dignity or integrity of the detained person. Any statement obtained under these conditions is absolutely null and cannot be used in criminal proceedings.

If the detainee has been subjected to any form of mistreatment, they must inform their lawyer immediately so that the necessary measures can be taken: filing a complaint before the judge, requesting a forensic medical examination, photographic documentation of injuries, and any other actions necessary to preserve evidence and demand accountability.

Right to the maximum detention period and to habeas corpus

Police detention cannot be prolonged indefinitely. The Constitution establishes that preventive detention may not last longer than the time strictly necessary to carry out the investigations aimed at clarifying the facts and, in any case, no more than seventy-two hours, after which the detainee must be released or brought before a judge.

This maximum period cannot be extended except by judicial decision in exceptional cases such as terrorism, where it may be extended up to five days. Outside these cases, if the police hold the detainee beyond 72 hours without bringing them before a judge, they incur illegal detention.

The specific mechanism to challenge illegal detention is the habeas corpus procedure, regulated by Organic Law 6/1984. This procedure, of extremely urgent processing, allows the detainee themselves or any person on their behalf to request that a judge review the legality of the detention and order, if it is unlawful, immediate release. The judge must decide within hours, and if illegality is found, release is immediate.

What to do if your rights are violated during detention

Knowing your rights is the first step; knowing how to react when they are violated is the second. If during detention any irregularity occurs —failure to inform of rights, denial of access to a lawyer, questioning without legal assistance, exceeding legal time limits, or ill-treatment— the correct course of action is as follows:

• Inform the lawyer as soon as possible and in as much detail as possible: what happened, when, who was present, and what consequences it had.
• Request, through the lawyer, that the judge declare null the defective actions and exclude improperly obtained evidence from the proceedings.
• If the violation constitutes a crime —ill-treatment, illegal detention, coercion— file a complaint or querella against those responsible.
• If ordinary remedies have been exhausted without success, appeal to the Constitutional Court through an amparo appeal to obtain protection of fundamental rights.

The effectiveness of all these avenues largely depends on acting quickly and with the advice of a specialized criminal lawyer. Violations that are not reported in time, or not properly documented from the outset, are much more difficult to prove and challenge successfully.

Frequently asked questions

Are these rights also guaranteed for foreign citizens?
Yes. The rights of detainees recognized by the Constitution and the Criminal Procedure Act apply to every person detained in Spanish territory, regardless of nationality or administrative status. Being a foreigner in an irregular situation does not deprive the detainee of any fundamental rights. In addition, foreign nationals have the additional right to have their detention notified to their country’s consulate or embassy if they request it, so that consular services can assist them.

Can the police question me before the lawyer arrives?
No. Once the detainee has requested legal assistance, the police are obliged to suspend any questioning until the lawyer is present. Officers cannot use the waiting time to ask informal questions, hold conversations about the case, or attempt to obtain information in any other way. If any communication about the investigated facts occurs during that waiting period —even if seemingly casual— the lawyer must be informed so they can assess its impact on the defense.

What happens if I sign a document during detention without understanding it?
Signing a document without understanding its content during detention can have serious legal consequences. If the document is the statement record and contains assertions the detainee did not make or that are distorted, the lawyer may challenge its content and request that the correct version be considered. In general, no document should ever be signed without the lawyer having reviewed and approved it. If the lawyer is not present, the detainee can —and must— refuse to sign until they arrive.

Can the police access my mobile phone during detention?
Access to the content of a mobile phone —messages, photographs, applications, call history— affects fundamental rights to privacy and secrecy of communications and generally requires prior judicial authorization. The police cannot access the detainee’s phone without such authorization, except in very exceptional urgent circumstances that must be properly justified. If the phone is accessed without judicial authorization, that evidence may be declared null, and the lawyer must act immediately to document the irregularity and request its exclusion.

What should I do if I believe my detention is illegal?
If the detainee or their lawyer believe that the detention has occurred without legal requirements or is being prolonged beyond the maximum allowed period, the immediate remedy is the habeas corpus procedure. This request may be submitted by the detainee themselves, their lawyer, spouse, close relatives, or any person on their behalf. The judge is obliged to resolve it with maximum urgency, within hours. If the illegality of the detention is established, release is immediate and unconditional. Additionally, if the illegal detention has caused harm, it is possible to claim liability from the State and criminal responsibility from the officers involved.