The police watchdog has concluded its report into a fatal crash in Bradford that left four people dead.
Murtza Chaudhry, 21, was driving a BMW which was also carrying Arbaaz Hussain, 21, Zeeshan Khalid, 20, and Tayyab Siddique, 22, in August 2018.
The car was being followed in Bradford by officers after it overtook a marked and an unmarked police car.
The vehicle crashed into a tree killing all four men, following a 34 second police pursuit.
The Independent Office for Police Conduct (IOPC) said its investigation had looked at footage and audio from the unmarked police car.
The final report has been submitted to West Yorkshire Police but will not be made public until the inquests into the deaths of the four men are concluded.

Controversial 500MW Solar Farm Spanning Milton Keynes and Northamptonshire Approved Despite Environmental Concerns
Nine People Charged with 49 Offences Following Major Police Raids in Rochdale
Calderdale Youth Justice Service Praised for Supporting Young People Despite Inspection Rating
Bradford Driver Jailed After Ramming Police Car in Huddersfield
Labour Loses Control of Hounslow Council After Councillor Charged with Fraud
Manchester Communities Invited to Apply for Remembrance Sunday Grants
Keighley Women and Children’s Centre Completes Major Expansion
Milton Keynes Man Convicted of Daesh-Related Terrorism Offences
Leeds Bradford Airport Workers Announce 48-Hour Strike
Bradford Youngsters to Mark World Food Day with Cookery Challenge
Four Men Charged Following Series of Warrants in Rochdale
The Golden Era
Legal Show
Remix Saturdays
Alim OnAir