Met Police detective had sexual relationship with woman he was investigating

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A Metropolitan Police detective began having sex with a woman while he was investigating her for an alleged crime.

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John McCarthy, who was an detective constable at the time, began sleeping with the woman in 2017 while investigating her for harassment.

The Granthshala Office for Police Conduct (IOPC) on Tuesday found that there was gross misconduct in their actions.


Mr McCarthy has served in the force’s North Area Command Unit at Enfield and Haringey, North London.

The affair with the woman, who cannot be named for legal reasons, began in January 2017, when he investigated a case in which he was accused of harassing her ex-husband and his mother.

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The harassment case against him was later dropped.

Their relationship continued, and the IOPC investigation found that Mr McCarthy and the woman had sex while attending a trial at Wood Green Crown Court on 22 March 2017. They also exchanged sexual text messages.

The IOPC said Mr McCarthy also obtained a loan of £3,580 from the woman between June and September 2017 and there was evidence that he may have intended to keep the money permanently. Suspicious gifts were also sent to him and he did not declare debts, ties or gifts to the owners.

The woman filed a county court claim against him, claiming that she failed to repay him when he later went into debt, leaving her ‘away from noodles’ and in danger of being evicted from his home. Mr McCarthy also failed to inform the Met about this.

Their relationship ended in October 2017.

Mr McCarthy resigned from the Met in January 2018, four years after the investigation into his misconduct began in January 2018, following a referral from the force to the IOPC on 5 September last month.

The IOPC’s two-day hearing ended on Tuesday and found that if Mr McCarthy had not resigned already, he would have been sacked by the Met. They have now also been placed on the ‘barred list’ of former officers who cannot work in policing in future.

IOPC regional director, Sal Naseem, said: “It is clear that John McCarthy took violent actions for his own sexual gratification and personal gain. Such behavior had no place in the police. Mr. McCarthy was called a police officer. As he was dismissed with immediate effect for abusing the trust and power placed upon him, he had not already resigned, and this is the outcome police officers should expect and achieve.

“His behavior has had a severe and devastating effect on his victim, and a corrosive, lasting effect on the public’s confidence in individual officers and the police service in general.”

The victim said in a statement: “I felt I had to satisfy him and play the game together. I felt obliged to play together because there was an imbalance of power between us. I fell in love with him but initially he would take my feelings.” Toy with. I think it made him feel more powerful. It made me insecure and scared.”

He said Mr McCarthy became “integrated” into his life, with his family, friends and neighbors becoming aware of their relationship.

“It affected confidence in the police because I don’t think he told any of his associates,” she said. “He was aware of mine and my child’s weaknesses, and he was aware of my financial weaknesses.”

The commander of Mr McCarthy’s former unit at the Met, Superintendent Simon Crick, said: “Having sex with someone you are investigating as a suspect goes against the basic principle that a police officer should have fairness, Integrity and should discharge his duties impartially.

He added: “The public should have faith and confidence in the police and the results show how committed we are to eliminating wrongdoing within the organisation.”


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