Aimee Pistorius , sister of South African Olympic and Paralympic sprinter Oscar Pistorius leaves at the end of the trial at the high court in Pretoria April 8, 2014. South African Olympic and Paralympic sprinter Oscar Pistorius sobbed in the witness stand on Tuesday as he described how, gripped by fear, he shot dead his girlfriend through a locked toilet door thinking she was an intruder. REUTERS/Siphiwe Sibeko (SOUTH AFRICA - Tags: SPORT ATHLETICS CRIME LAW)