Pistorius trial: 'Blade Runner' takes the stand

Stifling sobs, Oscar Pistorius took the witness stand Monday in his murder trial and apologized to the family of the girlfriend he shot dead, describing himself as traumatized and now on antidepressant medication, and sometimes waking from nightmares to the ''smell of blood.''

Oscar Pistorius weeps as he listens to evidence by a pathologist in court in Pretoria, South Africa, Monday, April 7, 2014. Pistorius is charged with murder for the shooting death of his girlfriend Reeva Steenkamp, on Valentines Day 2013. (AP Photo/Themba Hadebe, Pool)

Oscar Pistorius weeps as he listens to evidence by a pathologist in court in Pretoria, South Africa, Monday, April 7, 2014. Pistorius is charged with murder for the shooting death of his girlfriend Reeva Steenkamp, on Valentines Day 2013. (AP Photo/Themba Hadebe, Pool)

Pistorius reacts during his trial at the high court in Pretoria

Oscar Pistorius reacts during his trial at the high court in Pretoria April 7, 2014. REUTERS/Deaan Vivier/Pool

Oscar Pistorius speaks to a member of his legal team during his trial at the high court in Pretoria

Oscar Pistorius (R) speaks to a member of his legal team during his trial at the high court in Pretoria, April 7, 2014. REUTERS/Themba Hadebe/Pool

Oscar Pistorius' brother Carl Pistorius reacts during Oscar's trial at the high court in Pretoria

Oscar Pistorius' brother Carl Pistorius reacts during Oscar's trial at the high court in Pretoria, April 7, 2014. REUTERS/Deaan Vivier/Pool

Aimee Pistorius reacts during Oscar's trial at the high court in Pretoria

Oscar Pistorius' sister Aimee Pistorius reacts during his trial at the high court in Pretoria April 7, 2014. REUTERS/Deaan Vivier/Pool

Pistorius leaves court after his trial for the murder of his girlfriend was postponed in Pretoria

Oscar Pistorius leaves court after his trial for the murder of his girlfriend, Reeva Steenkamp, was postponed at the North Gauteng High Court in Pretoria March 28, 2014. REUTERS/Siphiwe Sibeko

Prosecutor mocks Pistorius' version of events

FILE - In this Feb. 19, 2013 file photo, olympian Oscar Pistorius stands following his bail hearing in Pretoria, South Africa. A judge in South Africa says Pistorius, who is charged with murdering his girlfriend, can leave South Africa to compete in international competition, with conditions. (AP Photo/File)

Oscar Pistorius reacts during his trial at the high court in Pretoria

Oscar Pistorius reacts during his trial at the high court in Pretoria April 7, 2014. REUTERS/Deaan Vivier/Pool

Pistorius leaves after attending his trial at the high court in Pretoria

Oscar Pistorius leaves after attending his trial at the high court in Pretoria April 7, 2014. REUTERS/Siphiwe Sibeko