An American man is facing life in prison after being found guilty of posting cyanide to a suicidal Briton.
Sidney Kilmartin was found guilty by a jury in the US on Tuesday of mailing injurious articles resulting in death and witness tampering.
He sent the substance to Andrew Denton, of Hull, who died in 2012.
The prosecution said Kilmartin had previously posted Epsom salt to a number of suicidal people, under the guise of cyanide, but later posted the real thing to Mr Denton in a bid to prevent him reporting the fraud.
Kilmartin had already admitted mail fraud and wire fraud.
Kilmartin posed as a jeweller to convince a distributor in California to send him 100 grams of the poisonous chemical for around £105 ($127 US dollars), according to evidence from a US postal inspector.
No date for sentencing has been set.