A Pinner GP who ran over and killed a baby while driving a hire car blamed technical problems for the tragedy.
Doctor Mohammed Hussain Fasle, 63, of Starlings Close, Pinner, was behind the wheel of a silver Ford Fiesta that swerved onto the pavement in Park Avenue, Willesden, on August 27 2007 and crushed Sasha Mason, a two-month-old being pushed in a pram by his mother.
The tot later died of his injuries in hospital.
Crown Prosecution Service lawyer Robert Whittaker told the jury at Harrow Crown Court that in police interviews the defendant claimed his steering had stopped working and efforts to apply the brake were fruitless.
But the court heard a police inspection of the vehicle found "no inherent or visible defects in the braking system or steering system."
Motorist Sharifah Ahmed who stopped to help described the horrific scene, saying she saw the infant's mother screaming "my baby, my baby".
She told the jury: "I could see the baby's lips turning blue. The baby's eyes were not open but he was gasping for air. one of the chaps standing beside me showed me blood coming out from the [child's] ears."
Dr Fasle denies one count of causing death by dangerous driving and the trial continues.