June Steenkamp says she is being haunted by the testimonies of Oscar Pistorius's neighbours who, during the first few days of the Paralympian's murder trial, recalled hearing the distressed screams of a woman the morning her daughter Reeva was fatally shot.

According to You magazine, June says she wakes up at 3am every morning, with the gut-wrenching screams of her daughter ringing in her ears.

"Three people gave evidence one after the other about hearing her screams. I can't get them out of my head. When I wake up at night, I hear them," said the 67-year-old mother.

And as she mourns the untimely death of her youngest daughter with husband Barry, June is clearly also struggling with feelings of guilt.

"You always try to protect your children. But I couldn't do anything when she needed me most. How could I not know she needed me?" she added.

"I wish I was there to comfort her, to try to help her. I couldn't even say goodbye to her. I wish I could've warned her. We didn't really fear for her life, except one day when Oscar was speeding with her in the car and she called me [from the car]."

June and Barry Steenkamp never met their daughter's famed boyfriend, who she had only dated for some three months before he shot and killed her during the early hours of Valentine's Day 2013.

June saw Pistorius face to face for the first time when she bravely attended day one of the highly-publicised murder trial, and has since said she wanted the two of them to look each other in the eyes. Oscar did not, however, grant her this wish.

"I wanted to look Oscar in the eye. I also wanted him to look at me and know I was there. But he didn't. He walked past me, looking straight ahead," recalls June, who says she suspects his legal team advised him to avoid looking at her.

"I tried to see his emotions but he looked down all the time and took notes. I heard he's cried a few times in court but I didn't see it."

Meanwhile, state prosecutor Andrea Johnson on Thursday revealed that the Oscar Pistorius murder trial, which was initially set to run for three weeks, is expected to conclude on 4 April.