Shots that killed Olivia are heard on CCTV as it emerges cops KNOW gunman's identity

Chilling video captured the sound of the gunshots that ended little Olivia Pratt-Korbel’s life – as it emerges that police investigating her shocking death at the hands of a masked gunman know her ‘scum’ killer’s identity, but the career criminal who was arrested at the scene is refusing to help officers.

The footage does not show the attack itself – but the audio clearly captures the sound of four gunshots in the Dovecot area of Liverpool.

Olivia was callously gunned down by a balaclava-clad mobster who also wounded the nine-year-old schoolgirl’s mother Cheryl while chasing a convicted burglar and former heroin dealer into her family home on Monday, in a sickening bloodbath that has appalled the nation.

The intended victim of the botched hit – career criminal Joseph Nee – was also wounded in the carnage and was taken to hospital by his friends, who heartlessly left Olivia to die in her mother’s arms. The 35-year-old serial crook, who had been jailed for a string of crimes…