Peter Lewis murder trial: Stabbing victim was 'not a threat'
24 January 2013 Last updated at 19:43 GMT
A disabled pensioner who was fatally stabbed at his home in Cardiff could get frustrated but was "never a threat", a court has heard.
Peter Lewis died in April after opening the door to William Jones, of Cardiff.
Mr Jones, 32, denies murder at Cardiff Crown Court and claims he must have stabbed Mr Lewis accidentally as he tried to take a knife off him.
But the prosecution disputed claims by a defence lawyer that the pensioner, 68, could be "aggressive".