A former juror's home was bugged by police following an allegation that she had taken a bribe.

Catherine Leahy, 62, was the spokesperson of the jury that returned acquittal verdicts in a drug trafficking, fraud and money laundering trail.

But on Friday she found herself in the dock at the High Court in Glasgow with her son, Joseph Leahy.

Prosecutors allege that between November 2, 2015 and June 2, 2016, while she was serving as a juror, she and her son agreed to "receive or accept a financial or other advantage."

Prosecutors claim that as a consequence of the two accused accepting the alleged "advantage", Mrs Leahy agreed that she would perform her task as a juror "improperly".

Joseph Leahy, 22, is also accused of being involved in the supply of cocaine and cannabis and possession of MDMA and cannabis

Detective Inspector Graeme Everest, of the organised crime and counter terrorism financial investigations unit, said the five-month long trial of Mr Graham Clarke ended on April 14, 2016.

The following day he received a phone call from the prosecutor fiscal who had been made aware of an allegation about a juror in the case.

The jury was told that following a meeting with the Lord Advocate and the Lord President it was agreed to allow all the jurors details to be released and for their financial backgrounds to be investigated.

Prosecutor Iain McSporran QC asked the witness: "Did you identify the juror or jurors?"

Detective Inspector Everest replied: "Yes we did.

"One juror - Catherine Leahy.

"We had very little to go on.

"We needed to interview jury members and had to go to the High Court to get permission."

In his 22-year career the officer said he had never heard of jurors being quizzed before and agreed with Mr McSporran that it was as "extremely unusual event."

The Chief Constable and the Scottish Government had to give approval before a bug could be placed in the Leahy's Glasgow home from September 19 to 30, 2016.

Det Inspector Everest said: "We have to ensure every other line of investigation had been explored.

"It was a last resort."

The court was told that 31 conversations between Leahy and her son were recorded by the hidden bug in their home.

Defence QC Thomas Ross asked the officer if the objective was to put Graham Clarke back on trial.

The witness replied: "Yes, but my aim was to get to the truth."

Graham Clarke and his co-accused were cleared of drugs and money laundering charges.

Clarke's wife Lindsey was found guilty of one charge of mortgage fraud.

The trial before judge Lord Turnbull continues.