'Trail of blood' at Pistorius house

Police followed a "trail of blood" up the stairs after being called to Oscar Pistorius' house, a retired officer has told the athlete's murder trial.

Col Schoombie van Rensburg said he found the South African Paralympian in a "very emotional state".

Earlier, a forensics expert defended police handling of evidence.

Mr Pistorius denies murder, saying he shot his girlfriend Reeva Steenkamp on 14 February 2013 after mistaking her for an intruder.

Andrew Harding reports.