A Suffolk detective has warned of the hidden dangers of cocaine during an inquest into the death of a man from Kirton who accidentally overdosed on what the officer described as “an extremely common drug”.

Richard Dunn, 22, of Innocence Lane, was found unresponsive in his bedroom on the morning of Monday, September 21, 2015, the inquest heard today.

A post-mortem examination found he had 7.55 micrograms of cocaine per millilitre of blood - just one microgram per millitre is potentially fatal.

The court heard that 6.87 grams of a pure form of cocaine was found in Mr Dunn’s bedroom, the drug was 80% pure which is much higher than most forms sold.

Mr Dunn, a landscape gardener, was a regular drug user and had been socialising with friends the night before.

On the morning of his death he had spoken to his stepmother Venus Dunn at 7.30am and she said he appeared to be drunk, the inquest, at Beacon House in White House Road, Ipswich, was told.

Mr Dunn was later found unresponsive by friend Nathan Jones, who was picking him up for work, and Mrs Dunn was alerted.

Paramedics were called to the house but Mr Dunn was declared dead at 11.14am.

A family statement read out to the court said it was “lucky” that other people had not suffered a similar overdose.

Police opened an investigation into the death and, giving evidence, Detective Constable David Daly said officers did everything they could to bring a prosecution in the case.

The court was told a man had been arrested on suspicion of supplying a Class A drug, but there was not enough evidence to bring the case to court.

Det Con Daly warned of the “hidden dangers” of cocaine. He told the court: “Cocaine is an extremely common drug in society these days. It is a drug of choice.”

A statement read from Suffolk Constabulary’s drug expert Scott Moledina said buyers of high-quality cocaine did not have to consume as much “to get high”.

It said: “If you (usually) take much lower quality (cocaine), you may not take as much as you usually do.”

Assistant coroner Nigel Parsley said it was not clear if Mr Dunn was aware how pure the cocaine was but said he had no intentions of ending his life.

Mr Parsley recorded a verdict of an accidental overdose of cocaine.