• Top 1% of Defence Law Firms

  • Defended over 50,000 Cases

  • 5 star google reviews

  • 40 Years of Criminal Law Expertise

Criminal Defence Articles

What happens for a first offence of Conspiracy to Murder?

Stuart Miller Solicitors | Criminal Defence Solicitor

Conspiracy to murder, a grave and complex offence in English criminal law, demands thorough understanding and expert navigation. This offence, distinct yet related to the act of murder, involves an agreement between two or more persons to unlawfully kill another. In this article, we’ll explore the legal framework, examples, and ramifications of a conviction for conspiracy to murder, particularly for first-time offenders. It’s crucial for anyone implicated to seek expert legal advice, given the intricacies of this offence.

What is the offence of conspiracy to murder in the UK?

In the UK, the offence of conspiracy to murder is governed by a combination of statutory law and common law influences.

The Criminal Law Act 1977 provides a general framework for the offence of conspiracy. Under Section 1, it defines conspiracy as an agreement by two or more persons to carry out either an unlawful act or a lawful act by unlawful means. In the context of conspiracy to murder, the ‘unlawful act’ is the premeditated murder. The Serious Crime Act 2007 further refines the understanding of the offence, particularly highlighting the necessary extent of involvement and intent for a conviction in conspiracy cases.

Over the years, judicial decisions have significantly shaped the interpretation and application of statutory conspiracy provisions. These legal precedents have provided clarity on what constitutes an ‘agreement’, ‘intent’, and an ‘unlawful act’.

To secure a conviction for conspiracy to murder, the prosecution must convincingly prove several elements:

  • Nature of Agreement: There must be a clear understanding between two or more persons. This agreement might be implied, verbal, or even unspoken, rather than formal or written.
  • Knowledge and Voluntariness: Each conspirator should knowingly and voluntarily participate in the plan, being fully aware of its unlawful nature.
  • Specific Intent: The conspirators must possess a direct intention to execute a murder as a result of their agreement.
  • Shared Intent: This murderous intent must have been common among all involved, regardless of their individual roles.
  • Primary Goal: The primary goal of the conspiracy must be the unlawful killing of a human being, distinguishing it from other forms of criminal conspiracy.
  • No Requirement of Overt Acts: Unlike some other legal systems, English law does not necessitate any actual steps towards the execution of the murder (known as overt acts). The essence of the crime lies in the mere existence of the agreement and the shared intent.

Given the substantial burden on the prosecution, proving a case of conspiracy to murder involves a thorough examination of communications, actions, and circumstances surrounding the formation of the agreement. The aim is not just to establish the presence of an agreement, but also to ensure that each defendant had the necessary intent to commit murder.

What are some examples of conspiracy to murder offences in the UK?

Examples of conspiracy to murder can vary widely, including:

  • Plotting a murder-for-hire scheme.
  • Agreeing to commit a gang-related killing.
  • Planning a domestic murder.
  • Collaborating on a politically motivated assassination.
  • Orchestrating a revenge killing.
  • Conspiring for a robbery-related homicide.
  • Planning a murder to claim insurance money.
  • Arranging an honour killing.
  • Coordinating a serial killing spree.
  • Plotting a murder to conceal another crime.
  • Planning a murder as part of a cult ritual.
  • Conspiring to commit a killing as a form of vigilantism.
  • Organising an assassination for corporate espionage.
  • Planning a killing in the context of a romantic rivalry.

What happens if you are suspected of committing conspiracy to murder in the UK?

If you are suspected of committing conspiracy to murder in the United Kingdom, several steps are typically followed in the legal process:

Investigation: Initially, law enforcement agencies will conduct a thorough investigation. This might involve gathering evidence, interviewing witnesses, and examining communications between the suspected conspirators. The aim is to establish sufficient evidence to support an arrest and charge.

  • Arrest: If there’s enough evidence, the police will arrest the suspects. During the arrest, suspects have certain rights, including the right to be informed of the reason for their arrest and the right to legal representation.
  • Detention and Questioning: Following the arrest, suspects can be detained for questioning. The Police and Criminal Evidence Act 1984 (PACE) sets out the rules for how long a suspect can be held before they must be charged or released.
  • Charging: If, after investigation and questioning, there is enough evidence, the suspect will be formally charged with conspiracy to murder.
  • Bail or Released Under Investigation: After being charged, suspects may be released on bail or under investigation while awaiting trial, depending on the circumstances. Bail decisions consider factors like the severity of the crime, risk of flight, and danger to the public.
  • Preliminary Hearings: Before the trial, there may be preliminary hearings. These are used to determine if there is enough evidence for the case to go to trial and to handle administrative matters.
  • Trial: If the case proceeds to trial, it will be heard in a Crown Court before a judge and jury. The prosecution must prove beyond reasonable doubt that the accused conspired to commit murder.
  • Defence: The accused will have the opportunity to present a defence. This might involve challenging the prosecution’s evidence, presenting an alibi, or other legal defences.
  • Verdict: The jury will deliberate and return a verdict of guilty or not guilty based on the evidence presented.
  • Sentencing: If found guilty, sentencing will follow. Conspiracy to murder is a grave offence, often carrying a lengthy prison sentence.
  • Appeals: The convicted individual has the right to appeal the verdict or the sentence if they believe an error was made during the trial or if new evidence emerges.

Throughout this process, the principles of legal fairness and the presumption of innocence until proven guilty are upheld. The legal system in the UK is designed to ensure that justice is served while protecting the rights of the accused.

What is the sentence for conspiracy to murder?

Conspiracy to murder is an inchoate offence in English law. This means it is complete as soon as two or more people agree to commit an unlawful killing. No further steps need to have been taken for a conspiracy to murder charge.

The maximum sentence for conspiracy to murder is life imprisonment. The sentencing guidelines state that the normal starting point should be 30 years imprisonment. The judge can reduce this based on mitigating factors relating to the offender’s role and culpability.

Here are some potential aggravating and mitigating factors the court may consider when sentencing for conspiracy to murder:

Aggravating factors:

  • The conspiracy involved significant planning, such as sourcing weapons or making detailed plans.
  • The intended victim was particularly vulnerable, such as a child or elderly person.
  • The motive involved retaliation, revenge, or hired killing.
  • The offender induced others to participate in the conspiracy.
  • The offender has previous convictions for violence or conspiracies.

Mitigating factors:

  • A lesser role in the conspiracy with limited involvement.
  • Voluntarily withdrawing from the conspiracy before it was put into effect.
  • Seeking help to prevent the murder from being carried out.
  • A previous good character with no prior criminality.
  • The offender has expressed genuine remorse.
  • The offender is young or has mental health issues or learning difficulties.
  • The offender acted under duress or pressure from others.

The final sentence length will be at the discretion of the judge, taking into account aggravating and mitigating circumstances. Accessorial liability is also relevant – if one person played a leading role they may receive a longer sentence than a minor participant. But all defendants found guilty of conspiracy to murder can expect a lengthy custodial sentence.

Will I go to prison if it is my first time committing conspiracy to murder?

In the UK, a first-time offender convicted of conspiracy to murder is highly likely to face imprisonment, given the offence’s serious nature. The sentence’s severity is influenced by a range of factors that the judge considers. These include the plot’s seriousness, particularly its stage of development and the immediacy of the threat, along with the individual’s role and level of involvement in the conspiracy. The offender’s motives are also scrutinised, whether they stem from financial gain, coercion, or other reasons.

A key consideration is the individual’s criminal history. While being a first-time offender might lead to some leniency, the gravity of conspiracy to murder usually results in a substantial sentence. Showing remorse and cooperating with authorities can serve as mitigating factors, potentially reducing the sentence.

Additionally, the judge considers the potential harm that could have resulted from the plot, the need to protect the public, and the importance of deterring similar crimes. Sentencing guidelines provide a structured framework for determining the sentence, which is also influenced by any aggravating or mitigating circumstances, such as targeting vulnerable individuals or the presence of mental health issues.

Where to get further help

Understanding and navigating a charge of conspiracy to murder requires experienced and trustworthy legal representation. This article has provided an overview of the offence, legal processes, and implications for first-time offenders. If you require more help, get in touch with the team at Stuart Miller Solicitors for a free consultation today.


  • Responsive

    A legal expert will consult you within 24 hours of making an enquiry.

  • Empathetic

    We will always treat you with trust, understanding and respect.

  • Specialised

    Your case will be handled by an expert who specialises in your type of offence.

  • Proactive

    We will take early action to end proceedings as soon as it is practically and legally possible to do so.

  • Engaged

    You will be kept updated on your case at all times. We will provide a named contact available to answer your questions.

  • Caring

    We understand this is a difficult and stressful time for you and your family. Our team will support you every step of the way.

  • Tenacious

    We will never give up on your case. We fight tirelessly to get you the best possible outcome.

Google Rating
Based on 352 reviews

Further Reading


Call 24 hours a day, 7 days a week.