Jeremy Bamber was convicted of the murder of his adoptive parents, his sister Sheila Caffell, and Sheila’s two children on 7 August 1985. After initially being sentenced to 25 years, the sentence was later increased to a whole-life order.
Initially, police believed it was a case of murder-suicide by his sister who had a history of severe mental illness, but on 29 September 1986 he was arrested and charged with murder.
The critical evidence that convinced the jury of Jeremy’s guilt was a flake of blood found on a silencer found in a cupboard. At trial, the jury was told that the discovery of an enzyme from the blood was clear evidence that the blood found on the silencer came from Sheila. However the jury never knew that this blood could have been from animals. The rifle and the silencers were used to shoot game and could have been carried alongside rabbits when returning from a shoot. Had the jury known that two types of animal blood were found on the outer surface of another silencer, they would have known that the blood was more likely animal blood than Sheila’s blood.