A foreign doctor convicted of the “mercy killing” of a patient in Spain later got a job with police in the UK, medical watchdogs have heard.

Dr Marcos Arel Hourmann worked for Dyfed Powys Police for more than two years despite being under investigation and subsequently convicted of manslaughter in Spain, the General Medical Council heard.

He had injected a patient severely suffering with cancer to “rid her of the unbearable suffering” and end her life, while working at a hospital in Spain in 2005, the GMC was told.

Within a year, Dr Hourmann, 52, had come to the UK and started to work for the West Suffolk Trust before getting another job with Carmarthenshire Trust and going to work for the police as a forensic medical examiner.

It is not clear if he was called as a witness in trials to give expert opinion on evidence during this job with the police.

The medic, who qualified as a doctor in Argentina and now lives in Spain, has not appeared for the hearing before the GMC’s Fitness to Practise panel and is not represented by lawyers.

He is accused of misconduct and dishonesty because he hid the investigation and his conviction from the GMC and employers.

Dr Hourmann also broke medical rules by failing to inform the GMC.

Currently suspended, he may now be struck-off the medical register by the GMC.

He was sentenced in 2005 to one year in jail, which was suspended, and a further sentence of four months, 15 days’ jail, substituted by him paying a fine of 1,620 euro (£1,359).

But in February 2006 he lied to get a job with the West Suffolk Trust.

In a self-declaration form he denied being under investigation, and in June 2007, applying for a job with Carmarthenshire Trust in the A&E department at the Prince Philip Hospital, he again denied there was no past, present or pending prosecutions on his record.

The hearing in Manchester is expected to last one more day.