Verywell. We have two answers from the guilt camp.
Adam sais it would be difficult or unethical and too much to ask of Julie.
Caroline said I'm like a pigeon.
Anyone else have any ideas or theories to put forward?
I'm not really sure why you've got this stuck in your throat. It's a scenario which nearly 31 years ago simply didn't take place, for one reason or another.
There are numerous potential reasons why it didn't occur and its not particularly difficult to put forward such suggestions, although I doubt a single one of them would be acceptable to you.
Nevertheless, some potential reasons include, but are not limited to, in no particular order:
a) The legislation was only enacted in 1984, it may not have filtered through to become 'common practice' for Essex Police to undertake.
b) Essex Police may not have even had such equipment available to them.
c) Essex Police, or more specifically Jones, may never have utilised such tactics before and didn't even consider it's use in this case.
d) Julie approached Essex Police and Jeremy was called in and questioned the following day, from their experiences as police officers, together with the sound moderator evidence, they may have decided that the course of action they took was appropriate and the best method of furthering the investigation. With JB having now served over three decades behind bars, who would disagree.
e) Whilst Jeremy had been allegedly open about certain aspects of his actions to Julie, he also appears to have been cryptic and manipulative, there would be no guarantee that JB would implicate himself further to the extent that it would be sufficient to charge him, it may then also tip Jeremy off and damage the investigation.
f) Jones may have already been convinced of Jeremy's guilt and didn't want a person who had murdered five people including two children, out on the streets where he could endanger other people.
g) Jones may not have been convinced of Julie's information and wanted to bring JB in so that he could question him face to face.
h) Or something else.
The possibilities are almost endless and we simply don't know the actual reasons for one thing or another. The suggestion that because the police didn't set up a wire on Julie to coax a confession out of JB, indicates that Julie's claims were fictitious, is in my view a bit silly and a little bit desperate, although not entirely surprising.