Latest News Wires Oscar Pistorius pleads not guilty as murder trial begins

The South African Olympic sprinter is on trial for the murder of his girlfriend inside his home in 2012.

Themba Hadebe/REUTERS

The first witness in the Oscar Pistorius murder trial testified Monday to hearing a woman's "blood-curdling" screams before the sound of four gunshots on the night the double-amputee Olympian killed his girlfriend.