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Prosecutor Timothy Cray KC said Prosper had deceived a private gun seller online using a forged shotgun licence to acquire his gun.

In his YouTube video, he referred to The Walking Dead video game but Mr Cray said Prosper was not "solely or even mainly motivated" by the that, due to his research of mass killers.

"Whilst unemployed his life seemed to revolve around going to the gym and spending time alone on his computers," Mr Cray said.

Michael Cray, prosecuting, said Curtis had tried to "look for a handbag on the rear seat" while still controlling the car's pedals.

McArthur Okorocha was arriving home from a night shift on Saturday morning to his home in St Paul's Cray, Orpington, when he heard "a lot of screaming" from a house across the road.