"(Reeva) phoned her mum and said ... 'Mum, Oscar's speeding,'" Steenkamp recalled. "So June took the phone and said, 'Let me speak to Oscar.' And (she) said to Oscar, 'Hey listen, that's my precious, and my only daughter ... she's my angel. And you'd better slow down or I will get the mafia onto you afterwards.' And Reeva said afterwards, 'Mum, he slowed down.'"
Now, Pistorius, 26, is free on bail as he awaits trial. His next court date is scheduled for June 4. Prosecutors say the track star killed his girlfriend after a heated argument in the early morning hours of Valentine's Day.
Pistorius and his attorneys insist he thought an intruder was hiding in a toilet room inside the bathroom of his Pretoria home. He says he fired in a fit of terror before realizing Steenkamp was inside.
"I'd like to ask Oscar why he didn't lean over and touch my cousin first ... and say 'are you OK?' 'keep quiet,' 'I'm coming now,'" Kim Martin said, shortly after her cousin's death.
As for what happens to Pistorius, Mike Steenkamp said it doesn't matter. Nothing will bring back their beloved Reeva.
But he does want one thing: a chance to meet with Pistorius and forgive him.
"That way, I can find more peace with the situation," he said, fighting back tears.
Steenkamp says it's his Christian faith that prompts him to want to offer forgiveness. And he wants to do it face to face, not through the media.
"Whatever the outcome, I feel with my belief (that) if Christ could forgive me when he died on the cross, why can't I?"