A man from Maine is facing life imprisonment after being found guilty of posting cyanide to a suicidal man in Britain.

Sidney Kilmartin was convicted of mailing injurious articles resulting in death and witness tampering after the death of Andrew Denton from Hull in 2012.

Prosecutors told the jury that Kilmartin, who lived in Windham, had previously posted Epsom Salts to a number of suicidal people pretending it was cyanide.

Mr Denton was one of those people and he was going to report Kilmartin for fraud.

Kilmartin then posted the real thing to the victim to stop him going to the authorities.

The American had obtained the poisonous chemical by pretending to be a jeweller in order to convince a distributor to send him 100g of the cyanide, which he bought for around £105.

Kilmartin, who had already admitted mail fraud and wire fraud but denied the more serious charges, is to be sentenced at a later date.

His defence lawyer had argued the prosecution had not successfully proved Kilmartin was responsible for Mr Denton’s death.

It took the jury less than three hours to find that he was.

(c) Sky News 2016: US man guilty of sending cyanide to suicidal Briton Andrew Denton