The impact of lost evidence on criminal cases
According to the BBC more than 30,000 criminal cases collapsed between October 2020 and September 2024 due to lost, damaged or missing evidence.[1] It found that around one in 20 prosecutions by the Met had been dropped due to missing evidence between 2020 and 2024, compared to one in 50 across England and Wales.
Following a FOI request from the BBC and University of Leicester, the number of cases reported as missing evidence were found to be increasing: in 2020, 7,484 prosecutions collapsed due to lost, missing or damaged evidence, compared to 8,180 in 2024, a 9 per cent increase.
The BBC reported that the cases recorded included:
- Physical evidence, including forensic evidence, being lost, damaged or contaminated during storage
- Lost digital evidence, including victim interview footage or body worn camera footage
- Witness statements or pathology reports not being provided by the police
- Key evidence not collected from the crime scene.
Tomorrow, the London Assembly Police and Crime Committee will meet to question the Deputy Mayor for Policing and Crime on the Met’s ability to safely store and collect evidence.
The Committee will also question the Deputy Mayor about online radicalisation, the Met’s recruitment pathways and the Met’s Culture, Diversity and Inclusion Directorate.
The guests are:
- Kaya Comer-Schwartz, Deputy Mayor for Policing and Crime
- Kenny Bowie, Director of Strategy and MPS Oversight, Mayor’s Office for Policing and Crime (MOPAC)
The meeting will take place on Wednesday 16 July 2025 from 10am in the Chamber at City Hall, Kamal Chunchie Way, E16 1ZE.
Media and members of the public are invited to attend.
The meeting can also be viewed LIVE or later via webcast or YouTube.
Follow us @LondonAssembly.
Notes to editors
- BBC News, Thousands of criminal cases collapsing due to missing or lost police evidence, 6 June 2025
- Marina Ahmad AM, Chair of the Police and Crime Committee, is available for interview.
- Find out more about the work of the Police and Crime Committee.
- Read the agenda in full.
- As well as investigating issues that matter to Londoners, the London Assembly acts as a check and a balance on the Mayor.
For more information, please contact Tony Smyth in the Assembly Media Office on 07763 251727 or [email protected]. For out of hours media enquiries please call 020 7983 4000 and ask for the Assembly duty press officer.