PRETORIA, South Africa (AP) — Oscar Pistorius’ murder trial enters a critical phase Monday as his defense team attempts to recover from a faltering start and reinforce the disabled athlete’s claim that he fatally shot girlfriend Reeva Steenkamp by mistake because he was overwhelmed by a long-held fear of violent crime.

Pistorius’ mindset when he stood on his stumps in a bathroom and pulled the trigger on his 9 mm pistol in the early hours of Feb. 14, 2013 remains the crux of the South African trial that has captured worldwide attention and is about to start its seventh week of globally televised proceedings. It was initially scheduled to run for three weeks.