A former Thames Valley Police officer has been permanently excluded from policing following a misconduct panel ruling in connection with fabricated documentation.

Liam Yeo, who previously served as a constable, faced allegations of serious dishonesty after records were submitted containing inaccurate details regarding witness communications.

The panel determined the former officer had created misleading entries on police database systems and provided false information to a senior colleague.

Yeo joined Thames Valley Police as a trainee officer and had been stationed at the Incident Crime and Response Team at Didcot Police Station from October 2023, five months after beginning his service.

Approximately one year afterwards, in October 2024, he was assigned responsibilities relating to a road traffic matter involving suspected drink driving.

During this investigation, the officer was instructed to obtain significant evidence from a witness identified in documentation as Mr XX.

However, the officer entered incorrect and deceptive information onto the MHG6 and NICHE database systems.

The entries suggested that contact had been made with the witness and that the individual could not recall specific case particulars, yet this account was subsequently proven false.

When the case files underwent review by a Justice Gateway Officer, responsible for examining investigation materials before court proceedings, examination of the emergency telephone recordings prompted doubts about the officer’s version of events.

An alternative officer subsequently obtained a statement from the witness, securing the crucial evidence required to advance the case.

During contact with the witness, a police sergeant established that Yeo had not communicated with Mr XX since the original incident.

Following an attempt to amend entries on the NICHE system in May 2025, the sergeant confronted the officer, who then acknowledged that his previous assertions about witness contact had been dishonest.

Misconduct allegations were formally issued in May 2025.

The officer departed from Thames Valley Police the following month.

A public hearing convened virtually on Wednesday, August 5 2025, under the direction of Chief Constable Jason Hogg.

The panel concluded that the former officer’s conduct was purposeful and calculated, with the panel noting that such deception risked allowing an incorrect outcome in legal proceedings had the matter not been exposed.

Panel members observed that recording unreliable data on official systems meant that future operational choices might have been founded upon false premises, and that the failure to comply with established protocols regarding documentation had compromised the integrity of the criminal case.

Furthermore, the fabrication of records, deceiving of colleagues and interference with an active investigation demonstrated behaviour that could erode public faith in law enforcement and damage the reputation of Thames Valley Police, according to the panel’s determination.

The outcome of the proceedings was that dismissal would have resulted had the individual remained in service, and his name was entered onto the official barred register.