Follow the trial of Metropolitan firearms officer Martyn Blake, who has been charged with the murder of Chris Kaba. Chris died from a single gunshot after being stopped by police in Streatham, south London, on Tuesday 5 September 2022. Martyn Blake, who was previously known only as NX121, has pleaded not guilty to murder.

In this episode reporters Adina Campbell and Ross Ryan follow the trial as it enters its second week, with experts - including a forensic scientist and a pathologist - entering the witness box. We also hear more details of a statement Martyn Blake made after he shot Chris Kaba, in which he said is "truly sorry" for the "enormous distress" felt by the family, but insisted it was "entirely proportionate, lawful and necessary".

Producer: Ross Ryan
News Editor: Gemma Stevenson
Executive Producer: Lorraine Maguire
Commissioning Editor: Alistair Miskin