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.
He revealed on his Twitter account that he shouted that he was a dog handler, before barking a few times for effect.
To his amazement one of the suspects stopped and gave himself up.
The arrested man has since been released without charge while police investigate the incident.