At around 4.20pm on Sunday, April 26, police were informed of a road traffic collision on the A3079 at Cookworthy Moor, Halwill, involving a silver VW Golf and blue tractor.
The driver of the VW Golf, a local man aged in his 50s, sustained serious head injuries and was taken to the Royal Devon and Exeter Hospital.
Specialist officers from the Roads Policing Team attended along with a forensic collision investigator and scene of crime officer.
A full investigation of the scene took place and officers are working to establish the exact cause of this collision.
Police would like to thank the public for their patience while they investigated the scene.
Officers are appealing for witnesses of the collision, or anyone with dash-cam footage, to come forward.
They would in particular like to speak with two motorcycle riders who passed the scene moments before the collision.