Some of the hardest crimes to prove can also be among the hardest allegations for an innocent person to disprove. What does that mean for criminal investigations — and for the family court?
By Falsely Accused Network | England and Wales
Two sides of the same problem
Imagine being accused of something that happened behind closed doors.
There are no witnesses. No CCTV. No recordings. No physical evidence that conclusively establishes what happened. One person says a crime occurred. The other insists it did not.
Now imagine being the person making a genuine allegation, knowing that the absence of independent evidence may make securing a conviction extremely difficult.
Both situations expose an uncomfortable reality: some of the hardest offences to prove can also be among the hardest allegations for an innocent person to disprove. This is particularly true of rape, controlling or coercive behaviour, stalking and harassment, and non-recent (historical) abuse allegations. These can involve private interactions, disputed conversations, contested intentions and events that happened months or even years earlier.
The challenges facing genuine victims are widely recognised, and rightly so. The difficulties faced by people who have been wrongly accused deserve equally serious examination. Understanding one does not require dismissing the other.
1. Rape allegations: when the central question is consent
Rape is among the most challenging offences to investigate and prosecute, particularly where sexual activity is accepted but consent is disputed.
Under section 1 of the Sexual Offences Act 2003, the prosecution must prove intentional penile penetration, that the complainant did not consent, and that the defendant did not reasonably believe they consented. Whether a belief was reasonable is judged on all the circumstances, including any steps the defendant took to establish consent.
Consider a hypothetical situation. Two adults spend an evening together, return to one person's home and have sex. One later alleges that it was non-consensual. The other maintains that it was consensual. There are no independent witnesses and no recording.
How does a prosecutor establish what happened? Messages, surrounding circumstances, accounts given to others, conduct before and after, and the consistency and reliability of the evidence may all be relevant. None necessarily provides a complete account.
Now reverse the question. How does an innocent person prove that consent existed during a private encounter? Even affectionate messages exchanged before or after do not necessarily establish consent to a particular act at a particular moment.
This does not mean rape cannot be proved without independent evidence. It can. The law does not require corroboration — the mandatory corroboration warning for sexual offences was abolished by section 32 of the Criminal Justice and Public Order Act 1994 — and a jury may convict on the evidence of a single credible witness. Nor does the absence of injuries show that sexual activity was consensual.
The difficulty is that evidence must be evaluated carefully, without assuming either that an allegation is true because it has been made or that it is false because independent evidence is unavailable. For the innocent accused, the inability to produce conclusive proof can be frightening. For a genuine victim, the inability to produce independent evidence can be equally devastating. Both arise from the same problem: the justice system must reconstruct a private event from incomplete information.
2. Controlling or coercive behaviour: when ordinary events become contested evidence
Controlling or coercive behaviour concerns a pattern of conduct rather than one dramatic incident, which makes it especially relevant to people whose relationships have broken down.
Under section 76 of the Serious Crime Act 2015, the prosecution must prove that the defendant repeatedly or continuously engaged in controlling or coercive behaviour towards someone personally connected to them; that it had a serious effect on that person; and that the defendant knew or ought to have known it would have a serious effect. That last element is partly objective: it is not enough for a defendant simply to say they did not realise the impact of their behaviour.
A "serious effect" has a specific meaning. It means causing the complainant to fear, on at least two occasions, that violence will be used against them, or causing serious alarm or distress that has a substantial adverse effect on their usual day-to-day activities.
Two further points matter. First, since 5 April 2023, the offence has applied to partners, ex-partners and family members whether or not they live together, following amendments made by section 68 of the Domestic Abuse Act 2021. Post-separation conduct is therefore squarely within its scope. This applies to behaviour on or after that date. Second, section 76 contains a defence where the defendant believed they were acting in the complainant's best interests and the behaviour was reasonable in all the circumstances. It is not available where the complainant was caused to fear violence.
This legislation is important because domestic abuse does not always involve physical violence. A person may endure years of intimidation, isolation, financial restriction or psychological abuse without visible injuries.
But consider the evidential difficulties from the other direction. A relationship breaks down. One partner alleges that the other controlled their finances, monitored their movements, discouraged friendships or exerted emotional pressure. The accused disputes this. They say financial arrangements were mutually agreed, that messages have been taken out of context, or that disagreements were ordinary relationship conflict.
An isolated text message may look threatening in one context and quite different when the full conversation is examined. Equally, apparently ordinary messages can form part of a genuinely abusive pattern. Context matters enormously — but context can itself be disputed.
How do you prove that you did not exercise coercive control over several years? There may be thousands of messages, countless private conversations and financial decisions never formally documented. The accused may have to respond to a broad narrative covering an entire relationship rather than one identifiable event.
That does not make the allegation false, nor does it make coercive control "merely a matter of interpretation". The offence has specific legal requirements that must be proved. But it shows why thorough, impartial investigation is indispensable.
3. Non-recent abuse: defending an allegation from decades ago
Non-recent (often called historical) sexual abuse allegations present another difficult evidential problem.
Genuine victims may delay reporting for many reasons, including fear, shame, trauma, dependency or concern that they will not be believed. Delay does not, by itself, make an allegation unreliable.
Nevertheless, the passage of time creates serious obstacles for both prosecution and defence. Imagine someone accused in 2026 of an offence said to have happened in 1996. Witnesses may have died. Records may have been destroyed. Buildings may have changed. Diaries, photographs and correspondence may no longer exist. The complainant may struggle to recall precise dates.
Now consider someone who says the allegation is entirely untrue. How could they establish where they were on an unspecified evening thirty years ago? How could they find witnesses, or recover records that no longer exist? This is particularly difficult where the allegation covers an approximate period rather than a specific date.
The absence of an alibi is not evidence of guilt. An innocent person may simply have no memory of an ordinary day decades earlier.
Courts recognise this. Juries in such cases are typically directed to consider the difficulties delay may have caused the defence, and in rare cases where a fair trial is impossible, proceedings can be stayed. The aim is to assess the effect of delay fairly, without treating delayed allegations as automatically true or automatically false.
4. Stalking and harassment: where is the line?
Harassment and stalking offences under the Protection from Harassment Act 1997 involve a "course of conduct" — for a single complainant, conduct on at least two occasions — that the defendant knows or ought to know amounts to harassment. The Act recognises that persistent conduct can cause serious harm even where individual incidents seem minor. It also provides a defence where the course of conduct was reasonable in the particular circumstances.
Consider two former partners in an acrimonious separation. They exchange dozens of messages about finances, possessions or their children. One says the messages amount to harassment. The other says they were trying to resolve legitimate practical matters.
Believing your communications were justified does not automatically make them lawful. Equally, finding communications upsetting does not automatically establish every element of an offence. Investigators must examine the course of conduct, its circumstances and the legal requirements.
For an innocent person, rebutting an allegation may mean reconstructing extensive communication histories and identifying missing messages. Selective screenshots can create an incomplete picture. A message may look aggressive without the exchange that preceded it, while a seemingly polite message may be threatening within a sustained campaign of intimidation. Both possibilities must be considered.
The central question is not how one party describes the behaviour. It is what the evidence, considered fairly and in context, actually establishes.
The problem with being asked to prove a negative
If someone alleges you did something, they are making a positive claim about an event. If you say it never happened, what evidence can you produce?
Sometimes there is a clear answer. CCTV may show you were elsewhere. Phone records may contradict a timeline. Messages may expose an inconsistency. Independent witnesses may show an allegation is impossible.
But sometimes no such evidence exists. Imagine being asked to prove that you did not threaten someone during a private conversation two years ago, or that you did not behave coercively during a ten-year relationship.
It would be wrong to say negatives can never be proved; alibis and objective evidence sometimes refute allegations decisively. The more precise point is that an innocent person may have no evidence capable of conclusively showing that an alleged private event did not happen. That is not a weakness unique to the accused. It is a limitation of the evidence available to the justice system — and it is why the presumption of innocence matters.
The presumption of innocence is not a technicality
In criminal proceedings in England and Wales, the prosecution ordinarily carries the burden of proof. The defendant does not have to prove their innocence, and the court or jury must be sure of guilt before convicting. There are limited statutory exceptions concerning particular issues and defences, but the fundamental principle remains.
If defendants had to prove allegations were false, some innocent people would face an impossible task. The presumption of innocence does not mean complainants should be disbelieved. It means criminal punishment requires proof of guilt, not merely an inability to demonstrate innocence.
One person's word against another's: can that be enough?
Yes. English criminal law does not generally require independent corroboration. A jury may be sure of guilt after hearing a single witness, without CCTV, DNA or another eyewitness. That principle is necessary because many genuine offences happen in private.
But it creates an obvious responsibility. Where a case depends heavily on personal testimony, the accuracy and reliability of that testimony become critical. A confident witness is not necessarily an accurate one. An inconsistent witness is not necessarily dishonest. And a defendant who cannot produce independent proof of innocence is not necessarily guilty.
An unproven allegation is not the same as a false allegation
An allegation that cannot be proved is not automatically false. A decision not to charge does not establish that the complainant lied. An acquittal does not necessarily establish fabrication. Equally, an allegation is not shown to be true because an investigation has begun, a charge has been authorised or a trial has taken place.
A genuine offence may have occurred without sufficient evidence. A witness may be honestly mistaken. Evidence may be incomplete or contradictory. Or an allegation may have been deliberately fabricated. These possibilities must not be treated as interchangeable.
At the Falsely Accused Network, we believe it is essential to recognise the experiences of people who have been falsely accused without claiming that every unsuccessful prosecution involves a false allegation. That would be as misleading as assuming every allegation is true.
Why the family court is different
For many of the people we support, the criminal process is not the end of the story. Allegations of domestic abuse frequently surface in family proceedings about children, often at the same time as, or after, a police investigation.
The family court works differently, and understanding the differences is essential.
The standard of proof is lower. The family court decides disputed facts on the balance of probabilities — whether something is more likely than not to have happened. The House of Lords confirmed in Re B (Children) [2008] UKHL 35 that this is the single civil standard, and that a fact is treated as either having happened or not. The person making the allegation bears the burden of proving it.
A criminal outcome does not decide the family case. Police taking no further action, the CPS declining to charge, or an acquittal at trial does not prevent a family judge from finding, on the lower standard, that the alleged events took place. The reverse is also true: an allegation is not proven in the family court simply because it has been made or reported to the police.
The court may hold a fact-finding hearing. Practice Direction 12J of the Family Procedure Rules 2010 governs how courts deal with domestic abuse allegations in child arrangements cases. The court must decide whether disputed allegations are relevant to the decisions it has to make about the children and, if so, whether a fact-finding hearing is necessary and proportionate.
Patterns matter more than isolated incidents. In Re H-N and others (children) (domestic abuse: finding of fact hearings) [2021] EWCA Civ 448, the Court of Appeal emphasised that family courts should focus on whether there has been a pattern of coercive or controlling behaviour, rather than examining isolated incidents in a vacuum. The court also cautioned against importing criminal law concepts into family proceedings.
For someone who maintains their innocence, this means a "no further action" letter is not a shield. You may need to respond to the allegations again, in a different forum, under a different standard, often without legal aid or legal representation. Preparing properly — preserving complete message histories rather than screenshots, setting out a clear and consistent account, and engaging with the relevant issues rather than simply denying everything — can make a significant difference.
The punishment that can begin before any finding
The legal presumption of innocence does not prevent serious consequences flowing from an allegation. A person under investigation may experience relationship breakdown, reputational damage, employment difficulties, financial pressure or severe distress. Allegations may affect contact with children, professional safeguarding decisions or family court proceedings — sometimes long before any trial, and sometimes even where no charge is ever brought.
That does not mean safeguarding measures are inherently unjustified. Authorities and employers sometimes have legitimate reasons to take proportionate protective action while serious allegations are investigated. But it raises an important question: how do we protect people from potential harm without treating an unproven allegation as an established fact?
What should a fairer system look like?
A fair system must take allegations seriously. It must give genuine victims the opportunity to report abuse, receive support and have their allegations properly investigated. It must also recognise that innocent people can be accused of serious wrongdoing. These responsibilities are not mutually exclusive.
The Falsely Accused Network believes several principles should be central:
Investigations must pursue evidence in both directions. This is not just good practice; it is a legal duty. The Code of Practice under the Criminal Procedure and Investigations Act 1996 requires investigators to pursue all reasonable lines of inquiry, whether they point towards or away from the suspect.
Context must be preserved. Communications, financial records and relationship histories should not be reduced to isolated extracts where the wider circumstances change their meaning.
Alternative explanations must be considered. Taking an allegation seriously should not mean deciding the outcome before the evidence has been examined.
Delay and missing evidence must be assessed fairly. The passage of time can disadvantage complainants and defendants alike.
The presumption of innocence must remain meaningful — not a principle recognised only after someone has endured months or years of investigation and its consequences.
Above all, the system must resist equating accusation with guilt, or lack of proof with fabrication.
Conclusion: the question we rarely ask
Public discussion often asks why certain offences are so difficult to prove. It is an important question. But another deserves to be asked just as often: if an offence is hard to prove because it allegedly happened in private, without witnesses or independent evidence, how hard might it be for an innocent person to prove it never happened?
In some circumstances, extraordinarily hard.
That does not undermine the experiences of genuine victims, and it does not mean the absence of independent evidence should automatically prevent a prosecution or a finding. It means justice — criminal and family — must remain grounded in evidence, fairness and the proper burden of proof.
A genuine victim denied justice is a serious failure. An innocent person wrongly convicted, or wrongly found to have committed abuse, is also a serious failure. A system worthy of public confidence must work to prevent both.
The difficulty of proving an allegation should never become a reason to presume it is true. And the difficulty of disproving one should never become evidence of guilt.
Facing allegations in family court proceedings?
The Falsely Accused Network supports people facing false or disputed allegations of domestic abuse in family court proceedings in England and Wales, including child arrangements, non-molestation and prohibited steps applications.
If you are dealing with allegations in the family court, book a free initial call to discuss your situation, or arrange a Family Court Case Review for a detailed look at your case.
Website: falselyaccusednetwork.co.uk Email: support@falselyaccusednetwork.co.uk Phone: 020 4538 8788
This article provides general information about the law in England and Wales. It is not legal advice, and the outcome of any case depends on its individual facts. The Falsely Accused Network provides McKenzie Friend and case support services; we are not a firm of solicitors.