Is the Tv showing Taff in his true light in so far as he decided murder/ suicide and that was it come what may and as far I could see the mattresses and presumably bedding was destroyed in the fire pit before the pathologist could complete his investigations?
Its all myth. Firstly the most senior officer at soc was Chief Sup George Harris who arrived long before DCI 'Taff' Jones and DS Stanley Jones. The Chief Sup wrote the soc off as 4 murders/1 suicide along with police surgeon Dr Ian Craig.
Soc officer DC Hammerlsey confirmed at trial everything of evidential value by way of blood stained bedding etc had been collected, given an exhibit number and preserved for forensics.
DCI Jones made notes in his notebook about the doors and windows all secured from within. He also made a note about blood stains on carpets notably the landing and hall which really tells the story.
One assumes DCI Jones was made a DCI for a reason. Unfortunately he had a tragic accident shortly before trial and died. He was always of the opinion SC was responsible. The accident was genuine in that he fell off some ladders carrying out diy at home.
If you're interested you can read wit stats etc in the archives/library.