Lawyers for Oscar Pistorius want answers after bloody photos of the bathroom where he shot his girlfriend dead last Valentine's Day were leaked to Sky News.
The British TV station published a series of images from inside Pistorius' home in Pretoria, South Africa.
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They show a pool of blood near the toilet, blood spattered across the bathroom walls and a bloody trail from Pistorius dragging the body of his girlfriend, Reeva Steenkamp, downstairs.
The double amputee sprinter has been charged with murder in the case.
He claims he was acting in self-defense when he shot Steenkamp, 29, four times through the bathroom door, saying he thought she was an intruder.
Lawyer Brian Webber told Reuters he's sent a letter to prosecutors demanding answers for the crime scene photos appearing the week before Pistorius is due back in court.
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A spokesman for the National Prosecuting Authority said it didn't know how Sky News had obtained the pictures, but that they would not affect the state's case against the man known as "Blade Runner."
In an interview with CNN published Friday, Pistorius' uncle said his nephew is a "heartbroken" man who has to live with the fact that he killed the love of his life.
"What can you say if the person you love the most dies, and you were the instrument? How would you feel? It's unthinkable," Arnold Pistorius said.