Mr Roberts fell off a ladder and suffered a serious spinal injury. At the hospital, it was decided to immobilise the fractures by means of a halo jacket and back brace, because of Mr Roberts existing condition of osteoporosis.
A couple of months later, he noticed clear fluid seeping from the pin site on the left side of his forehead. The halo also felt loose so he attended hospital and the pins were again tightened by a doctor. Afterwards, Mr Roberts experienced a severe headache which did not improve over the next few days. After becoming vague and vomiting, he was taken to hospital where was told that he had an infection at the site of the pin on the left side of the forehead and that the pin had penetrated his brain.