Date: 1 Jan 1966
Mr Barnett was a night watchman at the Chelsea Collage of Science and Technology. During the night on 1 January 1966 a colleague was struck on the head by a man with an iron bar. Mr Barnett took him to the hospital and when he returned he decided to have a cup of tea. However, someone put arsenic in it and he died.
see "Dying Man 'Was Turned Away'." Times [London, England] 26 Oct. 1967: 3. The Times Digital Archive. Web. 3 Mar. 2013.