A police officer driving a van who followed two teenagers before they both died in an e-bike crash in Cardiff will not face criminal charges, the Crown Prosecution Service (CPS) has said.
The CPS said there was insufficient evidence to provide a realistic prospect of conviction.
Head of its special crime division, Malcolm McHaffie, said it had decided that “no criminal charges will be brought against a South Wales Police officer”.
The deaths of Kyrees Sullivan, 16, and Harvey Evans, 15, sparked a riot in the city’s Ely suburb.
Best friends Kyrees and Harvey Evans were riding an electric bike when they fatally crashed on Snowden Road, shortly after 18:00 BST on 22 May 2023.
Following the deaths, rumours rapidly spread on social media that the boys had been chased by police before the crash.
Cars were set alight and fireworks thrown at police after 100 to 150 people gathered in Ely on the evening of the crash.
The disorder continued until the early hours, leaving 15 officers injured and property damaged.
The former South Wales Police and Crime Commissioner, Alun Michael, initially insisted that the two teenagers were not being followed by police before they died.
But CCTV footage analysed by BBC Verify later showed police were following the boys just minutes before the crash.
South Wales Police later said that its officers had been following the boys in the minutes before, and the force referred itself to Independent Office for Police Conduct (IOPC).
The IOPC served the driver of the police van, along with another officer in the vehicle, gross misconduct notices.
The CPS also announced it was investigating the police officer driving the van for dangerous driving.
On Monday, Mr McHaffie, said: “Following a thorough and detailed review of the evidence in relation to a single allegation of dangerous driving in this case, we have decided that no criminal charges will be brought against a South Wales Police officer.
“We have concluded that there is insufficient evidence to provide a realistic prospect of conviction.”
The CPS added in its statement that it fully understood that this would be “disappointing news for the families of both boys” and would offer a meeting with them to explain their reasoning further.