Sheila Caffell, who was known to have struggled with mental illness, was at first thought to have murdered her twin sons and adoptive parents and then to have turned the gun on herself. Forensic evidence, however, told a different story and raised such questions as how Sheila could have received two shots in an act of suicide. A year later it was Jeremy Bamber, the only survivor, who was convicted of the callous murders of his entire family. He is currently serving a life sentence, but continues to protest his innocence.