Joanna Dennehy pleads guilty to three murders in England (Clockwise from top left) Serial killer Joanna Dennehy, victims John Chapman, Lukasz Slaboszewski and Kevin Lee. Photo: SWNS/Newsteam A serial killer has stunned her lawyers by pleading guilty to murdering three men and dumping their bodies in ditches. Joanna Dennehy, who has a star tattooed under her right eye, admitted to the murders at the opening of her murder trial at London's Old Bailey. The 30-year-old from Peterborough told the court: "I have pleaded guilty and that's it." After the shock guilty pleas her barrister, Nigel Lickley, QC, told the court: "The course of the arraignment is not one we had anticipated." Dennehy also pleaded guilty to the attempted murders of two more men, Robin Bereza and John Rogers. She objected to her lawyers being given more time to check her guilty pleas and said: "I'm not coming back down here again just to say the same stuff. It's a long way to come to say the same thing I have just said. Dennehy's boyfriend Gary Richards, who is 220 centimetres and also known as Gary Stretch, appeared in court, denying three charges of preventing burial and the two attempted murders. Dennehy stabbed her landlord Kevin Lee, 48, and housemates Lukasz Slaboszewski, 31, and John Chapman, 56, within days of each other. The body of Lee was found in a roadside ditch in March. Four days later, a farmer found the corpses of the two other men in a remote dyke eight kilometres away. At the time of the murders, neighbours claimed Dennehy had been involved in a row over the rented property where she lived. Slaboszewski and Chapman, who was also unemployed, were said to have lived with Dennehy in a shared house owned by property developer Lee. Friends said Lee had been trying to evict Slaboszewski, Chapman and Dennehy in the weeks before the killings.