And now, we turn to the deepening mystery in the murder case against olympic hero oscar pistorius. Today, we saw dueling images. The once beloved athlete in court, hearing the charges against him.... See More
And now, we turn to the deepening mystery in the murder case against olympic hero oscar pistorius. Today, we saw dueling images. The once beloved athlete in court, hearing the charges against him. While his girlfriend was being buried, 700 miles away. Tonight, there are two versions of what happened, and abc's bazi kanani takes us through both. Reporter: In reeva steenkamp's hometown, her family gathered to say good-bye. There's only oneng missing, it's reeva. Reporter: Today, pistorius explained for the first time his version of events on that valentine's day. They were both sleeping, pistorius said, when he woke up and went onto the balcony when he heard a noise in the bathroom. In the pitch dark, he grabbed his gun and rushed into the bathroom, noticed an open window and thought an intruder was hiding in the toilet room. "I knew I had to protect reeva and myself," he wrote. He says he yelled for her to call police. And while still without prosthetics, he fired shots through the locked door, making what he says was a fatal mistake. Forensic experts are looking for a number of things in this particular case. They will look for the height of the shooter. Reporter: Ballistics will show if he was firing from a low angle, or if he was at that time much taller, wearing his prosthetics. The prosecution believes if they can show he was wearing prosthetics, they can rove his statement and argue premeditat premeditation. Prosecutors believe the couple fought that night. She locked the door for a purpose, said the lead prosecutor. Suggesting steenkamp fled into the bathroom to protect herself. Pistorius disputes this, saying they were deeply in love. And when he realized she was not in bed, he screamed for help, put on his prosthetic legs to kick open the door, only to have her die in his arms. The court will decide within the next couple of days whether to grant bail. There was a dramatic moment in court today when pistorius started sobbing uncontrollably while recalling that reeva gave him a valentine's day present that night, but asked him not to open until the next day.
This transcript has been automatically generated and may not be 100% accurate.