Pistorius trial: The evidence so far
27 March 2014 Last updated at 10:22 GMT
Lawyers for the South African Paralympic champion Oscar Pistorius will open the case for the defence in Pretoria on Friday.
He is standing trial for the murder of his girlfriend Reeva Steenkamp on Valentine's Day last year.
Mr Pistorius says that he mistook Ms Steenkamp for an intruder.
Karin Giannone looks at the evidence so far.