Oscar Pistorius' brother has told ITV News that he found Reeva Steenkamp's father's testimony "devastating" - but again denied that the athlete had intentionally killed her.
Pistorius was found guilty of murdering Steenkamp after a court overturned the original manslaughter verdict.
Barry Steenkamp's voice broke and tears rolled down his face as he told a sentencing hearing that he thought about his daughter "morning, noon and night".
Mr Steenkamp, who did not testify during the original trial due to health problems, said Pistorius "has to pay" for killing his daughter.
Breaking his family's recent silence on the case, Carl Pistorius told ITV News Africa Correspondent John Ray that the Steenkamps have been wrongly led to believe their daughter's death was murder.
"Mr Steenkamp's testimony today was devastating for me," he said.
"A particular heartache for me is that Reeva's parents have been made to believe that Oscar intentionally shot Reeva - there has been no evidence to support this belief despite the prosecution's best efforts."
Oscar Pistorius could face a jail term of 15 years.
His sentencing hearing is expected to conclude by Friday.