She was Bamber's girlfriend & didn't think he was serious.
I understand there had been no previous instances of a son murdering his mother, father, sister & two nephews in Essex. At least not in the previous week.
If she rang the police Bamber would 'jilt her'. Which Julie was apparently despatate to avoid. After all Bamber said she's lying because he did 'jilt her'.
How can you say that ? If she was his girlfriend she should have known him very well . According to her statements he give her intricate details and motives including why he would kill the twins . Not just casual throw away comments , details methods and plans . HE opened up about his family life and how he was allegedly badly treated and cyaninde burning and drugging were mentioned , and yet you understand why she did not believe him ? Pull the other one .
Someone convinced her he was guilty and how he did it and she saved her life and career by going along with it after she found out he had slept with her friend . imo of course