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Alonso Sala
CRIMINAL LAWYERS

Illegal Detention & Kidnapping Defense Lawyers

Criminal Lawyers in High-complexity criminal defense in crimes of deprivation of liberty and kidnapping

Illegal detention (Arts. 163-168 CP) consists of confining or retaining a person, depriving them of freedom of movement without a legal cause. The basic offence carries 4 to 6 years' prison; if a condition (ransom, doing or omitting something) is also demanded to release the victim, the conduct becomes kidnapping, punished with 6 to 10 years' prison. The penalty is raised to 5 to 8 years' prison if the confinement lasts more than 15 days (Art. 163.3 CP) and is imposed in its upper half if the victim is a minor or vulnerable person (Art. 165 CP). A private individual may only lawfully detain another person in the specific cases of Art. 490 LECrim (offender caught in the act or a fugitive). At Alonso Sala we defend both those accused of and victims of illegal detention and kidnapping.

You are accused of unlawful detention: what it means and what happens next

This is one of the few offences where the initial classification shapes the whole case, because the sentencing range starts very high and often comes with a request for pre-trial detention. Art. 163.1 CP carries 4 to 6 years' imprisonment for a private individual who confines or detains another, depriving them of liberty; if the offender releases them within the first three days without achieving their aim, the penalty is lowered by one degree (Art. 163.2 CP), and if the confinement lasts more than fifteen days, 5 to 8 years (Art. 163.3 CP). The defence almost always turns on two questions that precede the sentence: how long the deprivation of liberty actually lasted, and whether it was a minimal, instrumental restraint within another offence, which case-law absorbs into that offence rather than punishing separately.

What to do (and what not to do) before making a statement

  • Establish the chronology minute by minute. Phone location data, cameras, calls and witnesses. The exact duration decides whether Art. 163.2 CP applies, and that reduction is a full degree of sentence.
  • Do not testify about intent before knowing the exact charge. The offence is distinguished from coercion by the intent to deprive someone of liberty. Explaining motives before reading the charge sheet usually consolidates the more serious classification.
  • Document that the door or vehicle was not blocked. Photographs, technical reports on the lock or central locking, and evidence from anyone who could come and go. Actual inability to leave is the core of the offence.
  • Do not contact the alleged victim or their circle. With this sentencing range, contact is treated as a risk of repetition or obstruction and is one of the factors that weighs most in the decision on pre-trial detention.

What Is Illegal Detention and Kidnapping: Concept, Modalities and Penalties (Arts. 163-168 CP)

The crime of illegal detention (Arts. 163 to 168 of the Spanish Criminal Code) is one of the most serious types of Title VI on crimes against liberty. The protected legal interest is ambulatory freedom: the fundamental right guaranteed by Art. 17 of the Constitution to move freely without limitations other than those legally established. When one person deprives another of that freedom without legal cause, the criminal reproach is among the most severe in the legal system. Consolidated Supreme Court case-law has clarified that no physical lock-up is required: any form of effective movement deprivation suffices (tying, threatening with a weapon, blocking exit, armed surveillance even in open space) provided the passive subject cannot freely leave the place.

The Criminal Code articulates several modalities graduated in intensity and reproach. The basic illegal detention of Art. 163.1 punishes those who confine or detain another, depriving them of liberty. Art. 163.2 contemplates voluntary release within the first three days as a specific mitigating factor that reduces the penalty. Art. 163.3 aggravates the penalty when detention lasts more than fifteen days. Art. 163.4 provides for the case of those who, not being authorized, retain another to present them immediately before authority. The kidnapping of Art. 164 is the aggravated modality par excellence: detention conditioned upon fulfilment of a demand (ransom, action, omission); penalties are substantially higher. Art. 165 further aggravates when the victim is a minor, person with disability or official in the exercise of their functions. Art. 166 sanctions the autonomously typified offence of failing to give account of the whereabouts of the disappeared person. Art. 167 aggravates when the conduct is committed by authority or public official outside legally permitted cases. And Art. 168 sanctions the provocation, conspiracy and proposition to commit these crimes.

Penalties are among the most severe in the Code. Basic illegal detention under Art. 163.1 carries 4 to 6 years' prison; if it lasts more than 15 days, the penalty rises to 6 to 10 years. The kidnapping of Art. 164 sanctions with 6 to 10 years' prison; with the aggravations of Art. 165 it may reach 15 years. The modality of Art. 166 (failing to give account of whereabouts) provides 10 to 15 years' prison in illegal detentions and 15 to 20 years in kidnappings, with penalties in the upper half if the victim is a minor or person with disability. When the perpetrator is authority or official (Art. 167), penalties are imposed in their upper half with absolute disqualification of 8 to 12 years. On the custodial penalties, civil liability also operates for moral damage (between €300 and €1,000/day of deprivation, depending on gravity), psychological sequelae (PTSD, chronic anxiety) and patrimonial damage.

Technical defense is built on several axes consolidated by case-law. The first is the concurrence of legal cause: Art. 490 LECrim authorizes any citizen to arrest a criminal caught in flagrante, a fugitive from prison or one attempting to commit a crime, provided that delivery to authority is immediate; exceeding those limits turns the retention into illegal detention. The second is self-defense under Art. 20.4 CP when the deprivation of liberty was necessary, proportionate and responded to prior unlawful aggression. The third is free and valid consent of the victim, which excludes unlawfulness if genuine and not vitiated by deceit, fear or coercion. The fourth is the requalification to coercion under Art. 172 CP when the deprivation was not total ambulatory but rather restrictive of freedom to act: the Supreme Court carefully distinguishes between confining and merely preventing doing something. And the fifth is the spontaneous-release mitigating factor of Art. 163.2 when the active subject voluntarily releases the victim within the first three days, reducing the penalty by two degrees.

In current forensic practice, illegal-detention and kidnapping proceedings concentrate in several recurrent scenarios. Neighborhood or private-security disputes with excess in the retention of alleged shoplifters; couple crises with confinement or prevention of leaving the joint home; inheritance disputes with retention of elderly relatives to force signing of powers or wills; economic controversies with retention until debt payment ("express" kidnapping); and, in its most serious form, organized extortive-kidnapping networks, frequently connected with drug trafficking or transnational crime, assigned to the Central Investigating Courts of the National Court. ECtHR case-law on deprivation of liberty and the ECtHR case law on covert workplace video surveillance, among others, and Organic Law 13/2015 on procedural guarantees have reinforced judicial-control standards on any restriction of liberty. At Alonso Sala we intervene both in defense of the accused and as private prosecution of the victim, articulating forensic psychological expert reports to prove post-traumatic stress, camera analysis and chronological reconstructions. We treat each file with the conviction that in these crimes — given the magnitude of penalties — the client's freedom or fair compensation of the victim depends on technical rigour from the very first proceeding.

Illegal Detention vs Kidnapping

Illegal Detention (Art. 163)

Depriving someone of freedom without legal cause. Penalty: 4-6 years. E.g.: confining someone after dispute, preventing leaving room, tying victim.

Kidnapping (Art. 164-165)

Illegal detention + demanding CONDITION (ransom, do/omit something) to release. Penalty: 6-10 years. Aggravated modality. E.g.: express kidnapping, retaining until debt payment.

IMPORTANT When Can Individual Legally Detain? (Art. 490 LECrim)

Individuals can ONLY detain in VERY specific cases. Outside them, commit illegal detention crime

1. Criminal In Flagrante

If catch someone committing crime (robbery, assault), can detain ONLY to deliver immediately to police.

2. Fugitive in Search

If person legally in search and capture (escaped from prison, arrest warrant)

3. Attempting to Commit Crime

If attempting to commit crime and detention necessary to prevent it

Illegal Detention Specialist Services

Why Alonso Sala for Illegal Detention?

Illegal detention is one of most serious crimes. We defend with technical rigor both accused and victims

  • Technical defense proving legal causes (Art. 490), self-defense, or consent.
  • Private prosecution for victims: compensations of €50,000-200,000 in kidnappings.
  • Psychological coordination: evaluate trauma and PTSD to maximize compensation.
  • Experience in complex cases: irregular custodies, gender violence, family disputes.

Crimes Against Persons in Spain: Homicide, Assault and Threats — Defense Guide

Crimes against persons — homicide (Art. 138 CP), murder (Art. 139 CP), assault/bodily harm (Art. 147-156), and threats (Art. 169-171 CP) — are among the most severely punished offenses in Spain, frequently resulting in substantial prison sentences. A robust forensic and legal defense is critical from the first moments of arrest.

Penalty Table: Crimes Against Persons

OffenseArticlePenalty
Reckless HomicideArt. 1421 – 4 years
Intentional HomicideArt. 13810 – 15 years
Murder (Asesinato)Art. 13915 – 25 years
Aggravated MurderArt. 140Permanent Revisable Prison
Minor AssaultArt. 147.2Fine 1-3 months
Serious Bodily HarmArt. 1496 – 12 years
Criminal ThreatsArt. 1691 – 5 years

Core Defense Strategies

Self-Defense (Art. 20.4 CP)

The three legal requirements are: unlawful aggression, proportional response, and no provocation. Documenting prior threats and injuries is paramount from day one.

Reclassification: Murder → Homicide

The difference between Art. 138 and 139 CP means up to 10 years' additional prison. Defense focuses on disproving premeditation, treachery, or cruelty — the three murder qualifiers.

Psychiatric Defense / Diminished Responsibility

If the accused had a mental disorder at the time of the act, total or partial irresponsibility (Art. 20.1) or diminished responsibility (Art. 21.1) significantly reduce or eliminate the sentence.

Forensic Medical Evidence

Independent autopsy, injury assessment, and toxicology reports often contradict expert testimony submitted by the prosecution. A second forensic medical opinion is always recommended in serious cases.

FAQs

What is illegal detention crime (Art. 163 CP)?
Consists of confining or detaining person depriving them of freedom of movement without legal causes justifying it. Protected legal asset is ambulatory freedom, one of most important fundamental rights. Read the full analysis
Difference between illegal detention and kidnapping?
KIDNAPPING is AGGRAVATED modality of illegal detention. Occurs when, besides depriving victim of freedom, DEMANDS some CONDITION (money/ransom, do something, omit something) to release. Penalty: 6-10 years (vs 4-6 in basic illegal detention). Read the full analysis
Can individual legally detain someone?
YES, but ONLY in VERY specific cases regulated by Art. 490 LECrim: 1) Criminal in flagrante. 2) Fugitive in search. 3) Attempting to commit crime. Outside these cases, individual commits illegal detention crime.
What penalties for illegal detention?
Basic illegal detention: 4-6 years prison, rising to 5-8 years if it lasts MORE than 15 days (Art. 163.3 CP). Kidnapping (with ransom condition): 6-10 years, imposed in the higher degree if the kidnapping lasts more than 15 days (Art. 164 CP). If victim is minor or vulnerable person: AGGRAVATING. Very high penalties.
Is it illegal detention to prevent someone leaving room?
YES, if there's EFFECTIVE deprivation of freedom. Don't need to lock with key. Enough to block door, threaten, or use force to prevent person from leaving. Duration: even minutes can suffice if violence/intimidation.
What if claimed it was 'joke' or 'scare'?
Does NOT exempt. If there was real deprivation of freedom (even brief), it's CONSUMMATED crime. That author thought to release quickly or it was 'joke' is irrelevant. Victim's fear and objective deprivation of freedom are sufficient.
Is it crime to lock my minor child in room?
DEPENDS. If PROPORTIONAL and brief EDUCATIONAL CORRECTION (e.g. 1 hour punishment), jurisprudence supports (right of correction). But if prolonged, disproportionate, or cruel confinement, YES can be illegal detention + family abuse.
Can I detain thief stealing in my store?
YES (criminal in flagrante, Art. 490 LECrim). But ONLY to deliver IMMEDIATELY to police. Can NOT lock in room for hours or hit. Force use must be STRICTLY necessary (self-defense). Excess = illegal detention.
Is it kidnapping to retain someone until pay debt?
YES. Classic kidnapping: deprivation of freedom + ransom condition (pay debt). Penalty: 6-10 years. Doesn't matter if debt was real. NEVER permitted to 'take justice' by depriving anyone of freedom.
What is 'illegal detention simulating authority'?
SERIOUS aggravating. Consists of making victim believe being detained by public authority (police, judge) when not true. E.g.: saying 'I'm police' and confining someone. Penalty increases significantly (similarity with authority usurpation).
Minimum duration to be crime?
NO legal minimum. Even MINUTES can suffice if effective deprivation of freedom with violence/intimidation. What's relevant: victim could NOT leave freely, even if short time. Cases of 10-15 minutes convicted.
Is it legal for nightclub security to retain me in room?
ONLY if flagrant crime (e.g. caught stealing) and retention is MINIMAL to wait for police. If retain WITHOUT legal cause, for discussion or 'unfounded suspicions', it's illegal detention. Private security has NO police power.
What to do if accused of illegal detention?
1) Do NOT declare without lawyer. 2) Justify: Was there legal cause (Art. 490)? Was self-defense? Was consent? 3) Prove minimum duration and no violence. 4) Allege mistake of fact (believed acting legally). Technical defense crucial.
Can there be illegal detention in family context?
YES. Typical cases: irregular custodies (parent retains child without court authorization), gender violence (confining partner at home), elderly disputes (children 'kidnap' father to sign powers). Even if family, it's CRIME if forced freedom deprivation.
Is it crime to kidnap kidnapper to free victim?
Complex. If using force STRICTLY necessary to free victim in imminent danger (state of necessity, Art. 20.5 CP), can be justified. But if 'kidnap' kidnapper AFTER for revenge, YES it's crime. Everything depends on proportionality and urgency.
Difference with coercion (Art. 172)?
COERCION: preventing someone doing legal thing or forcing to do against will (without reaching complete ambulatory freedom deprivation). ILLEGAL DETENTION: TOTALLY depriving freedom of movement (confine, tie). Coercion is 'lesser crime' (prison 6 months-3 years).
Does it matter if there was violence or intimidation?
YES, A LOT. If freedom deprivation achieved with violence or intimidation, can concur separate crime of coercion/threats/injury. Penalties ACCUMULATE. If serious violence, can aggravate illegal detention penalty in upper half.
Is it illegal detention to confine someone in car?
YES. Don't need 'locked room'. Can be car, trunk, room, basement, even open field if armed surveillance prevents escape. What's relevant: EFFECTIVE freedom deprivation, regardless of physical place.
Can I claim victim consented?
IF there's FREE and VALID consent, NO crime. But must be AUTHENTIC consent, not vitiated by deceit, fear, or coercion. E.g.: consensual 'sexual game' NOT detention. But if victim says 'stop' and don't stop, YES it's crime (revoked consent).
When does illegal detention crime expire?
Basic crime (4-6 years): expires 10 years from victim's release. Aggravated kidnapping (6-10 years): expires 10 years. It's SERIOUS crime with long prescription. Important: period counted from when freedom deprivation ENDS.
Civil liability: how much compensation?
VERY high compensations. Moral damage for freedom deprivation: €300-1,000/day depending on severity. Long kidnappings: easily €50,000-200,000. If violence, psychological damage, or PTSD sequelae: compensation multiplies. Plus, lost income and medical expenses.
How much does a lawyer for an illegal detention case cost?
There is no single fee: our fees depend on the procedural stage, the complexity of the case (the duration of the deprivation of liberty, whether a condition was demanded that raises the facts to kidnapping, or whether other offences such as threats or assault concur) and the court that must try it. We set a fixed budget after studying the matter, so you know from the outset what to expect. Read the full analysis
Do you act throughout Spain?
Yes. Although the firm is based in Madrid, we take on the defense before any court in the national territory, including kidnappings committed abroad, whose investigation falls under the National Court (Audiencia Nacional).

Crimes Against Liberty Defense

Crimes against liberty share a common feature: evidence is built on testimony, messages and temporal reconstructions. Effective defense requires forensic analysis of instant messaging and contextual assessment.

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