The trial of a U.S. resident accused of mailing cyanide to an Englishman who killed himself has been pushed back to October.

Sidney Kilmartin faces federal charges of mailing injurious articles resulting in death, wire fraud, mail fraud, witness tampering and witness retaliation.

He was scheduled to stand trial in May, but the date was pushed back to accommodate a new attorney.

Investigators say the Windham, Maine, man advertised and mailed a substance he claimed was cyanide to several suicidal people. The substance was actually Epsom salt.

Prosecutors say he mailed the real thing to 49-year-old Andrew Denton of Hull, England, to keep him from telling investigators about the fraud. Denton used the cyanide to take his life.

Kilmartin has pleaded not guilty.