Now this suggestion does not sit well with me and to my mind is just illogical. To blame her lie on Jeremy lying to her when we only have her word for suggesting that there was a hit-man? Nothing from anybody else at all. Even the so called hit-man denies it.
How on earth can you suggest that it was Jeremy that was lying and not Mugford herself? Indeed if anything this lie is an indication that her whole statement was spurious.
You have to take the timeline into consideration before you peruse the hitman detail in Julie's statement. Here is a 21 year-old student(20 at the time of murders,19 when they met) under the influence of Jeremy,one may say besotted,going along with every word he says maybe at the expense of her better judgement. The murders occur and the official verdict is four murders and a suicide from the Head of Essex Police DCI Taff Jones no less,who is shooing away the powerful,landed relatives from his office,let alone an outsider like Julie with her story in her mind. She quizzes Jeremy about the murders like a dog with a bone,and Jeremy makes up the first thing which comes into his head about a hitman,though does admit to being the instigator,which totally destroys any love or respect Julie once held for him. She finally realizes he's a sociopath at Blazer's Restaurant,Blackheath where Jeremy admits he "feels nothing for them..maybe there is something wrong with me.." and coupled with the relatives' suspicions Julie determines on telling what she knows..