PRETORIA, SOUTH AFRICA – OCTOBER 17: Oscar Pistorius leaves the North Gauteng High Court after the fifth day of sentencing on October 17, 2014 in Pretoria, South Africa. The defence and the state have now concluded their arguments and the judge will now deliver her sentence decision on Tuesday 21st October. Pistorius having been found guilty of the culpable homicide of his girlfriend Reeva Steenkamp after mistaking her for an intruder. (Photo by Charlie Shoemaker/Getty Images)

Olympian Oscar Pistorius has been denied leave to appeal in regards to his conviction for murdering his girlfriend Reeva Steenkamp.

The Constitutional Court in South Africa rejected his right to appeal against his conviction, leaving his sentencing to take place in April, where he now faces a minimum of 15 years in jail. The South African High Court will hold the sentencing.

Pistorius shot his girlfriend Reeva Steenkamp through the door of a bathroom in his Pretoria home back in February of 2013. He alleged that he mistook her for an intruder when he fired the shots. A manslaughter verdict was overturned in December, and a murder verdict was introduced instead.

A picture taken on January 26, 2013 shows Olympian sprinter Oscar Pistorius posing next to his girlfriend  Reeva Steenkamp at Melrose Arch in Johannesburg. South Africa's Olympic sprinter Oscar "Blade Runner" Pistorius was taken into police custody on February 14, 2013, after allegedly shooting dead his model girlfriend having mistaken her for an intruder at his upscale home. AFP PHOTO / WALDO SWIEGERS        (Photo credit should read WALDO SWIEGERS/AFP/Getty Images)
A picture taken on January 26, 2013 shows Olympian sprinter Oscar Pistorius posing next to his girlfriend Reeva Steenkamp at Melrose Arch in Johannesburg. South Africa’s Olympic sprinter Oscar “Blade Runner” Pistorius was taken into police custody on February 14, 2013, after allegedly shooting dead his model girlfriend having mistaken her for an intruder at his upscale home. AFP PHOTO / WALDO SWIEGERS (Photo credit should read WALDO SWIEGERS/AFP/Getty Images)

Pistorius is best known for becoming the first amputee sprinter to ever compete in the Olympics in the 2012 Summer Games in London.

The judge who originally cleared Pistorius of murder, Thokozile Masipa, will be the one sentencing him in April. BBC News is reporting that prosecutors are believed to be targeting a sentence of at least 15 years in jail for Pistorius.

Pistorius has now exercised all options, as the Constitutional Court was his last chance in overturning his murder conviction. He served less than a year in jail (on an original five-year sentence), and has been on house arrest, under which he’ll remain until his sentencing.

About Harry Lyles Jr.

Harry Lyles Jr. is an Atlanta-based writer, and a Georgia State University graduate.