Germans close inquiry into death of Jeremiah Duggan

However this month prosecutors in Wiebaden closed their long-running inquiry, to the shock of his mother, Erica.

She said: “It is a scandal that after all these years the Wiesbaden Prosecutor refuses even to interview me. The danger that killed my son still remains.”

Mr Duggan died not long after leaving Paris to attend a youth conference in Wiesbaden organised by the Schiller Institute, the German front organisation of LaRouche, a political movement centred around controversial US political figure Lyndon LaRouche.

Mrs Duggan, who lives in Golders Green, described LaRouche as “a cult” and said German authorities had ignored “vital lines of enquiry”.

Mrs Duggan hopes were raised in 2012 when the Frankfurt High Court found mistakes had been made in the investigation.

In 2015 a forensic scientist cast doubt on events leading to the death of Mr Duggan, suggesting that his suicide was staged.

At an inquest into his death at North London Coroner’s Court, Alan Bayle said he also believed the incident had been “staged”.