A Metropolitan Police constable who exploited his position to gain trust before sexually assaulting multiple women he encountered through dating applications will learn his sentence in June following conviction on eight serious sexual offences.
Dion Arnold, 33, awaits sentencing on 22 June at Guildford Crown Court after jurors found him guilty of four rape charges, two counts of assault by penetration and two sexual assault offences committed against women who believed his police credentials made him safe company.
The convicted officer worked within a specialist domestic abuse unit whilst simultaneously serving as an Army reserves medic—roles prosecutors emphasised gave him expert understanding of consent laws and vulnerable victim psychology, knowledge he weaponised against those he targeted.
Senior Crown Prosecutor Claire Gallagher condemned Arnold’s calculated approach. “These women believed that, as a police officer, they could trust Arnold and would be safe with him. He abused that trust in the most appalling way,” she stated, noting he “deliberately targeted women that he thought would not stop him and would never have the courage to report him.”
The investigation commenced in March 2025 when one victim reported Arnold to authorities. Forensic examination of his mobile device uncovered a list of women’s names, prompting investigators to contact individuals who subsequently disclosed allegations of rape or sexual assault involving the officer.
Trial evidence revealed Arnold ignored repeated requests to cease his assaults, with victims testifying they felt compelled to submit despite expressing clear refusal. Messages between Arnold and his victims referenced their objections, demonstrating his awareness of their non-consent.
“One told him in messages that he had ‘destroyed and broken her’, while another described feeling ‘powerless’ and that she had no option but to submit. In law, that is not consent,” Gallagher explained.
Chief Superintendent Dan Knowles, responsible for policing in Arnold’s South West operational area, expressed revulsion at the crimes. “We are sickened that Pc Arnold carried out these horrendous crimes while serving as a police officer in the Met, something he deliberately told the victim-survivors from the outset so that they would have more trust in him.”
The conviction emerges against a backdrop of systemic Metropolitan Police vetting failures exposed earlier this year, with Scotland Yard admitting over 130 officers and staff employed despite inadequate screening have subsequently committed crimes or misconduct—including two serial rapists.
A damning audit revealed at least six forces, including the Met, secretly abandoned employment reference checks during recruitment drives seeking 20,000 additional officers, enabling thousands to join without basic verification despite obvious public safety risks.
