Lynda Spence trial: Missing woman was 'police mole' 17 January 2013 Last updated at 15:49 The trial of four men accused of abducting, torturing and murdering a missing financial adviser has been told that she was a police informant. Defence QC Derek Ogg said Lynda Spence was married to an Albanian criminal, Sokol Zefaj, and had been recruited to provide intelligence about him. A police witness said this information could have put her life in danger. David Parker, Paul Smith, Philip Wade and Colin Coats deny killing the 27-year-old Glasgow woman in May 2011. The trial at the High Court in Glasgow heard for a second day from Det Sgt Aileen Boyle, from Strathclyde Police's major crimes investigation team. Safety concern She was cross-examined by Mr Ogg, who is acting for Mr Coats. He asked: "Did it become clear early in the investigation there was a fear that Lynda Spence had been done to death," and she replied: "There was concern for her safety." Mr Ogg then said that Ms Spence was an undercover mole and added: "She was recruited specifically to provide information not on Colin Coats or anyone else in the dock, but on Albanian Sokal Zefaj do you know who he is?" She had been recruited by the SCDEA to be a grass, a mole on the inside of a criminal organisations End Quote Gary Allan Defence QC Det Sgt Boyle replied: "He is a businessman and we had information Lynda Spence may have been married to him at some point." Mr Ogg said: "She was in fact married to him and it was for this reason that she was recruited by the Scottish Crime and Drug Enforcement Agency (SCDEA) and the UK-based Serious Organised Crime Agency. Did you know this? She replied: "No." The police officer was then asked by Mr Ogg: "Would you agreed with me that would place Lynda Spence in very serious risk of her life if it was to be disclosed she was informing on an Albanian organised crime gang," and replied: "If that was the case." Det Sgt Boyle was then asked if she knew that 48 hours after Ms Spence went missing her handler in the SCDEA was contacted and told she had disappeared. She was asked if, as a serving police officer, this would cause her concern and she agreed. The court was told that at the time she went missing, Ms Spence was living with a Ukrainian woman in Glasgow. This woman was the former lover of Mr Zefaj and, so the jury was told by Mr Ogg, still in love with him. Intelligence source Mr Ogg then asked: "As a serving police officer would you consider it safe for a confidential human intelligence source's identity to be known to the criminal underworld," and she replied: "No." Earlier defence QC Gary Allan asked Det Sgt Boyle: "Was Lynda Spence up to her neck involved in criminal activity?" She replied: "She was involved in criminal activity." Mr Allan added: "She had been recruited by the SCDEA to be a grass, a mole on the inside of a criminal organisations," and Det Sgt Boyle said: "I don't know. It's not information that would be shared. Solicitor General Lesley Thomson QC asked the police officer if anything pointed to an Albanian gang being involved in the alleged murder of Ms Spence and she replied: "Absolutely not." Sgt Boyle told the jury that in February 2012 a well at a farm at Law Brae, West Kilbride, was searched for Ms Spence's body. A field was also excavated looking for her body, but nothing was found in either location. All four accused deny all the charges against them. The trial before judge Lord Pentland continues.