Defense lawyers for Paralympic champion Oscar Pistorius will begin telling his side of the story on Friday. Prosecutors have rested their case, after more than three weeks of often graphic testimony. The South African athlete shot his girlfriend on Valentine's Day last year. He says he thought she was an intruder. Prosecutors claim it was pre-meditated murder.

It's a well-rehearsed drill. The final day of the prosecution's case began with more questions for expert witness Col. Francois Moller. The sequence of events just after 3am - after the shooting of Reeva Steenkamp - could prove vital. That has, once again, been the focus.

That Johan Stander, the manager of the estate, followed, a minute later, by one to emergency services, then 2 further calls, to a security guard - then an incoming call in return.

That appears consistent with the claim by Pistorius that he called security first.

Calls also to a friend Justin Divaris, his father and his agent - but about half an hour later.

On Monday, there'd been evidence of tensions between the couple Messages suggest they'd been arguing. The defence picking other messages, and showing CCTV footage -- suggesting there were far more fonder moments. The final witness during the prosecution's case - was called by the defence. Who pointed to a mark on the toilet door they say backs his claim that he was on his legs when he bashed it down. Police appear to have either missed it, or left it out. And that's it. Just over 3 weeks spent focused on forensics, and the athlete's background. Any time from Friday, we could hear from Pistorius himself.