All supporters " tell lies ",Mike. 
I'm not telling lies...
When I say that physical evidence existed at the scene
strongly implicating Sheila Caffell in the killings.
Regardless of whether Sheila Caffell had or hadn't been alive when TFG entered farmhouse - any police officers who paid sufficient attention inside the building, would have recognised and understood the significance of the evidence.
The nature of the evidence was/is exculpatory with regard to Jeremy:
although he was not a police suspect at that time - he very quickly became a suspect in the eyes of some relatives.
Relatives were provided with information by police on
several occasions - to the point were
at least two of them accepted Sheila could have committed the killings.
Relatives chose to reject this information. The eventual culmination of the relatives choosing this path - was that the evidence that implicated Sheila and exculpated Jeremy was concealed, in order that Jeremy could be prosecuted for the killings.
All truth - no lies here I'm afraid.
When the truth is eventually made public - my prediction is that the relatives will continue to try to manipulate and garner sympathy - by blaming the police for the wrongful conviction. They will express that the police withheld information from them. Information that if they had have been made aware of - would have prevented their campaign against Jeremy and the original investigating team.
But it comes full circle. Because they
were told convincing information that had confirmed Sheila's role to police. They
were told Sheila was the killer.
I bet they also blame Julie Mugford also. They will blame
anyone but themselves