Pistorius unseen: What we couldn't show you before

'''On October 21, 2014, Oscar Pistorius was sentenced to five years prison for killing Reeva Steenkamp. But the law cited by the South African judge allows him to apply to serve the rest of his term under house arrest, after just 10 months.

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We couldn’t show you the footage online, until now.

The video shows Pistorius describing in graphic detail the events leading up to the moment he shot his girlfriend.

The 27-year-old paralympian is shown in a Nike singlet running without his prosthetic legs and pretending to hold a gun out in front of him.

It also shows how he bashed down the bathroom door and, using his sister to demonstrate, how he pulled Reeva from the bathroom and carried her down the stairs.

The digital re-enactment was made by The Evidence Room, which specialises in forensic animation.

The video has convinced top US forensic investigator Scott Roder that his story is true. Roder was hired by Pistorius' uncle in October 2013 to analyse his version of events.

VIDEO: The unseen footage - What we couldn't show you online

In Sunday Night’s exclusive interview, Roder says he is convinced Pistorius did not mean to kill his girlfriend on the morning of February 14, after weeks of interviewing and analysing the evidence.

"Absolutely, the physical evidence is consistent and his story remains unchanged," Roder told Sunday Night reporter Ross Coulthart.

"If you look at the evidence Oscar's clearly not guilty."

Roder says Pistorius' unwavering account of his movements that day and the physical evidence has him convinced of the Blade Runner's innocence.

Full coverage: Oscar Pistorius murder trial
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"When he’s on his prosthetics, you know he’s very tall broad-shouldered athletic guy he looks like he can really handle himself," Roder said.

"But when he takes his prosthetics off and he’s on his stumps uh he’s short, the confidence washes away from his face."

Timeline: February 14th 2013

3.12am – shots were heard from Pistorius’s home in Pretoria, South Africa.

3.19am – Pistorius called a neighbour.

3.20am – He phoned for an ambulance.

3.21am – He called Security at the compound.

25.61 seconds later, he went back to the bedroom on his stumps to put on his prosthetics.

He then carried Reeva downstairs.

Read Sunday Night's full report here.

To gauge public opinion, Sunday Night also conducted a live viewer vote as the investigation was presented.

With over 1.1 million votes - the audience was divided nearly 50/50 during the whole show.