Martyn Blake denies the murder of 24-year-old Chris Kaba on 5 September 2022 in Streatham, south London.
The Audi Q8 Kaba was driving had been stopped by police who believed it was linked to a firearms incident the previous night in nearby Brixton.
Blake, 40, told the jury at the Old Bailey he had never fired his gun at a suspect before in six years serving as an armed officer.
Officers had followed the Audi that Kaba was driving and having forced it to stop jumped out of their vehicles as they raced to "extract" the driver, shouting "armed police" and "show me your hands".
Previous police witnesses, as well as Blake, said the Audi tried to escape, and the firearms officer said he heard the revving of engines and the screech of tyres.
The court heard how Blake rushed out of his marked police BMW, which was blocking the Audi at the front, and fired a single shot in 17 seconds.
Denne historien er fra October 15, 2024-utgaven av The Guardian.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
Allerede abonnent ? Logg på
Denne historien er fra October 15, 2024-utgaven av The Guardian.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
Allerede abonnent? Logg på
Frozen pensions War Veteran says she lost out on £50,000
Anne Puckridge is travelling 4,400 miles on a mission to persuade the government to right a 'cruel' pensions policy, as Rupert Jones reports
Money hacks How to buy preloved items to give as Christmas gifts
Buying preloved often requires more thought and preparation than buying new, so make time to find the perfect gift.
The Filter Best robot vacuums to keep your home clean and dust free
Stuart Andrews trialled the most powerful robot vacuums - some of which even mop your floors - and these are the ones he rates
Checkatrade How do rogue traders get past its checks?
The site says its tradespeople are 'guaranteed', but some customers say they have lost thousands after using it. Anna Tims reports
End of road Vauxhall workers in shock over plant closure
\"I don't have anything good to say about this place right now,\" someone shouts, as workers flood out of the front gates of the Vauxhall van plant on Luton's Kimpton Road.
Hybrid car sales could be permitted until 2035 to ease all-electric transition
Car manufacturers may be allowed to sell Toyota Prius-style hybrid models in the UK until 2035, as the government looks at ways to loosen electric vehicle sales rules.
Royal Mail falling further behind with delivery targets
Royal Mail has failed to deliver about a quarter of first-class post on time in recent months as its delivery performance continues to decline amid an investigation for missing its targets.
'Dirty money' Why people of all ages are investing in crypto
Miles, a 37-year-old NHS doctor from London, has been trying for years to persuade friends to buy cryptocurrencies.
Work Minister's plan to transform the job market
\"This is why I love jobcentres: because they're intensely hopeful places.\" The employment minister, Alison McGovern, has spent half an hour perched on a desk in an office block in Hoxton, east London, hearing from a group of job coaches.
Shoppers bag Black Friday gifts online but in-store sales lag
UK shoppers visited websites in droves to snap up Black Friday bargains, raising hopes the US-inspired promotional day would finally kick-start a festive spending spree.