Samuel Skinner KC, prosecuting, described how Bane, an educational psychologist, and a colleague who cannot be named for legal reasons had just left a nearby school and were stood near parked cars in Egginton Road.
Cooper, who was on duty and using the black Peugeot 208 without authorisation, had left Etwall Leisure Centre and was driving without his seatbelt on.
Skinner said car data showed Cooper’s foot was pressed on the accelerator when it swung to one side.
Bane’s companion was struck and thrown into the air while he was crushed between two parked cars shunted together by the impact.
The court heard Bane, who had two teenage children, died in the road of pelvic injuries.
After the collision, Cooper, from Etwall, was “confused” and told members of the public he was a painter and decorator and did not know who the prime minister was, the court heard.
In a subsequent police interview he suggested he may have passed out at the wheel but refused officers permission to access his medical records.
However the court heard he had been asked by a neurologist in 2009 to stop driving and contact the Driver and Vehicle Licensing Agency (DVLA) because he had episodes of randomly collapsing.
Skinner said: “The defendant should not have been behind the wheel of that unmarked police car that day because he had an unexplained medical history of blackouts that occurred without warning.
“Years before this incident, the defendant had been told by a consultant neurologist not to drive and to inform the DVLA about his blackouts.
“But he did not tell the DVLA about the blackouts, neither did he tell his employer or car insurer.”
