A suspect must have thought he was barking mad when he gave himself up to police - after an officer pretended he was a dog.
PC Steve Hutton had tried to pull over a suspicious vehicle allegedly travelling over the speed limit in Swindon.
But, when a stinger device was used to stop it, the four occupants fled, and PC Hutton gave chase.
In an attempt to get the man to stop, the Roads Policing Officer at Wiltshire Tri Force shouted he had a dog - before barking for full effect.
To his surprise the man gave himself up, and PC Hutton promptly arrested him.
The arrested man has since been released without charge while police investigate the incident.