Key Points
- Oliver Cosh, 36, of Wensum Crescent, Bicester, was jailed for nine years at Oxford Crown Court on 26 June.
- He was convicted of six counts of sexual assault of a child under 13 by touching and one count of causing a child under 13 to engage in sexual activity.
- Thames Valley Police said he abused two victims, one aged eight and the other aged 10 and 11.
- Police said he used threats of violence to stop the children speaking out.
- Cosh was placed on the Sex Offenders Register for life.
- He will also be subject to a Sexual Harm Prevention Order.
- Det Con James Boden, of the Child Abuse Investigation Unit, said the abuse was a shocking exploitation of two vulnerable children.
- Boden praised the victims for their courage and resilience during the investigation.
- Police said Cosh failed to take responsibility for his actions.
Oxford (Oxford Daily) June 29, 2026 – Oxford Crown Court jailed Oliver Cosh for nine years after a week-long trial in April found him guilty of serious sexual offences against children. The court heard that the offending involved two victims and that one of the key aggravating factors was the use of threats of violence to prevent disclosure. The sentence, handed down on 26 June, also brought lifelong sex offender registration and a Sexual Harm Prevention Order.
As reported by Thames Valley Police, the case centred on abuse carried out against two children in Oxford, including one victim aged eight and another aged 10 and 11. The police account said Cosh’s conduct represented a grave breach of trust and safety, and officers described the offences as especially serious because of the intimidation used afterwards.
What did the court hear?
Cosh was convicted of six counts of sexual assault of a child under 13 by touching and one count of causing a child under 13 to engage in sexual activity. Those verdicts followed a trial at the same court in April. The convictions indicate the court accepted that the offending was not isolated but involved repeated criminal behaviour.
Det Con James Boden, of the Child Abuse Investigation Unit, said Cosh was “a predatory offender” and that his actions represented
“a shocking exploitation of two vulnerable children”.
He added that Cosh used threats of violence to suppress the victims’ disclosures, which further increased the seriousness of the case. Boden also commended the victims for the courage and resilience they showed throughout the investigation.
What penalties follow now?
Beyond the nine-year sentence, Cosh’s placement on the Sex Offenders Register for life means he will remain under long-term legal monitoring after release. The Sexual Harm Prevention Order adds further restrictions designed to reduce the risk of future harm. Together, these measures show the court treated the case as one requiring both punishment and ongoing public protection.
The police statement also said Cosh failed to take responsibility for what happened. That detail is important because it suggests the court and investigators saw no sign of acceptance or remorse during the process. In child sexual abuse cases, that can affect how authorities assess risk and rehabilitation.
Why is this case significant?
This case is significant because it involves very young victims and coercive behaviour designed to silence them. The use of threats of violence after the abuse made the offending more serious in the eyes of investigators and the court. It also highlights how child abuse can involve both direct harm and intimidation that deepens the trauma.
The police comments place emphasis not only on the offender’s conduct but on the victims’ response to the investigation. By publicly recognising their resilience, officers signalled the importance of disclosure and support in cases where children may feel fear, shame or pressure not to speak. The sentencing outcome also reflects the courts’ approach to serious offences against children, where long custodial terms and protective orders are commonly used.
Background of the development
This case reached sentencing after a week-long trial at Oxford Crown Court in April, where Cosh was found guilty of multiple offences against two children. Police identified the investigation as one handled by the Child Abuse Investigation Unit, which suggests the case was treated as a serious safeguarding matter from the outset. The sentencing on 26 June concluded the main criminal proceedings reported in the case summary.
The police account indicates that the abuse involved a child aged eight and another victim who was aged 10 and 11 during the offending. That age range is central to understanding why the case has been treated as particularly grave. The combination of sexual abuse, repeated offending and threats of violence also explains the length of the sentence and the additional restrictions imposed by the court.
What could this mean for the public?
For parents and carers, the case is a reminder of the importance of noticing behaviour changes, encouraging safe disclosure and taking children’s concerns seriously. For schools and youth organisations, it reinforces the need for strong safeguarding systems and confident reporting routes. For the wider community in Oxfordshire, the sentence may offer some reassurance that such offences are being pursued and punished firmly.
For victims of abuse, the case may also underline how important it is that authorities listen when children are afraid to speak. The police emphasis on courage and resilience shows that disclosure can be difficult, but it can also be the step that allows a case to be investigated and brought before the courts.
