Can You Be Arrested Based on a Single Allegation?

Being accused of a criminal offence can be extremely unsettling, particularly when the allegation is serious or relates to a sexual offence. It can come as a surprise to learn that the police may arrest someone even when the case appears to rest on the account of one person.

This raises an important question: can the police arrest you based on a single accusation?

The answer is yes. However, an arrest should not be confused with a finding of guilt. Being arrested does not mean that you will be charged, prosecuted or convicted. The police must still investigate the circumstances and assess the evidence before deciding what action, if any, should follow.

Understanding the arrest process and your rights from the beginning can help you make informed decisions and avoid unintentionally compromising your position.

What Is the Legal Threshold for Arrest?

The police do not need to have enough evidence to prove an offence before making an arrest. Under English law, the relevant test is whether an officer has reasonable grounds to suspect that an individual has committed an offence and whether arrest is necessary.

This is a considerably lower threshold than the standard required for a conviction.

As a result, one person’s allegation may provide sufficient grounds for an arrest where officers believe there are reasonable grounds for suspicion and that arrest is necessary. This could be because they believe it is necessary to:

• Investigate the allegation properly;
• Secure or preserve potentially important evidence;
• Prevent evidence from being destroyed or altered;
• Protect a complainant or other potential witnesses; or
• Obtain an account from the suspect through a formal interview under caution.

This can be particularly relevant to sexual offence investigations, where alleged incidents may have taken place in private and there may be no independent witnesses.

Why Might the Police Arrest Someone at an Early Stage?

An arrest does not necessarily mean that the police have completed their investigation. In many cases, it is one of the first steps in gathering and assessing evidence.

Depending on the circumstances, officers may arrest someone so that they can carry out investigative actions such as:

• Seizing phones, computers or other electronic devices;
• Conducting searches of premises;
• Preserving potential forensic evidence;
• Carrying out a recorded interview under caution;
• Preventing contact between individuals involved in the investigation; or
• Taking steps to prevent potentially relevant evidence from being lost.

There are also circumstances where the police may ask someone to attend a voluntary interview rather than arresting them. This does not mean the matter is unimportant or that legal advice is unnecessary. Anything said during a voluntary interview may still become part of the evidence and potentially be relied upon later.

Does an Arrest Mean You Will Be Charged?

No. An arrest is not the same as a criminal charge.

Once an investigation has taken place, the evidence must be considered before a decision is made about whether a prosecution should proceed. Where the Crown Prosecution Service (CPS) is involved, prosecutors will generally consider whether there is a realistic prospect of conviction and whether bringing a prosecution would be in the public interest.

An investigation can therefore end without any charge being brought. In some circumstances, the police may decide to take No Further Action (NFA), meaning the investigation will not proceed at that stage.

It is important not to assume that an arrest means the police have already decided that the allegation is true. The investigative process exists to establish what evidence is available and whether it supports a prosecution.

How Important Is Digital Evidence?

Digital evidence can play a significant role in modern criminal investigations, particularly where allegations concern events that took place between individuals who communicated electronically.

Depending on the circumstances, investigators may examine material including:

• Text messages;
• WhatsApp conversations;
• Emails;
• Dating app messages;
• Photographs and videos;
• Social media posts and messages; and
• Location information.

Importantly, digital evidence does not necessarily support the allegation being investigated. It can also provide evidence that challenges or contradicts an account.

The surrounding context may be particularly important. Communications between individuals before or after an alleged incident could potentially provide information relevant to the circumstances of the allegation. This is one reason why evidence should be carefully preserved and reviewed rather than assumptions being made about what individual messages mean in isolation.

What Happens When You Are Arrested?

Following an arrest, you will normally be taken to a police station and processed through custody. You should be informed of your rights, including your right to obtain legal advice.

The process will generally involve:

1. Being taken into police custody;
2. Being booked into the custody suite;
3. Being given the opportunity to speak to a solicitor; and
4. Being interviewed under caution, where appropriate.

The police interview can be one of the most important stages of an investigation. It may be tempting to try to explain the situation immediately, but answering questions without first obtaining legal advice can create difficulties later.

A criminal defence solicitor can assess the circumstances, discuss the available evidence with you and advise you on how best to approach the interview. They can also ensure that proper procedures are followed and that your rights are protected.

Legal advice at the police station is available free of charge, regardless of your financial circumstances.

Can a Person Be Convicted Based on One Person’s Evidence?

Yes. There is no general requirement under English criminal law for a prosecution to produce multiple witnesses before a conviction can take place.

A court can, in principle, convict where the evidence of a single complainant is accepted as credible and reliable and the prosecution has established the case to the required criminal standard of proof.

That does not mean that a single allegation automatically results in a conviction. The prosecution must still prove its case beyond reasonable doubt.

A defence solicitor may therefore examine the evidence carefully, including:

• Whether accounts contain inconsistencies;
• The reliability and credibility of witnesses;
• Relevant text messages and other digital material;
• The chronology of events;
• Issues surrounding disclosure of evidence; and
• Whether the evidence as a whole supports the allegation.

The outcome will ultimately depend on the particular facts and evidence in the individual case.

Why Is Early Legal Advice Important?

If you have been accused of an offence, obtaining legal advice at an early stage can be extremely important. Decisions made during the initial stages of an investigation can have consequences for the case later on.

For example, you should avoid taking actions that could create further evidence or interfere with the investigation, such as:

• Deleting messages, photographs or other potentially relevant material;
• Contacting the complainant about the allegation;
• Posting about the situation on social media; or
• Attending a police interview without first taking legal advice.

A specialist defence solicitor can explain what you should and should not do, help protect relevant evidence and advise you throughout the investigation.

What Should You Do If You Have Been Accused?

A single allegation can be sufficient for the police to consider arresting someone where the legal requirements for arrest are met. However, an arrest is not proof of guilt and does not automatically result in a charge or conviction.

The investigation must still consider the available evidence and determine whether there is a sufficient basis for the case to proceed.

If the police contact you about a criminal allegation, particularly one involving a serious or sexual offence, it is important to seek specialist legal advice as soon as possible. Having a solicitor involved from the outset can help you understand the process, protect your legal rights and ensure that your case is approached carefully from the earliest stage.