The Beagle Collie cross died of terrible injuries after being pulled at a speed of up to 115 kmph near Brighton area in East Sussex, a county in South East England.
The dog's mangled body was eventually dumped in a paved area beside the main road and the motorist drove off.
Officers found the battered corpse Sunday night.
Detectives believe the incident was deliberate and suspect it may have been triggered by a domestic row between the dog's owners.
Published 22 November 2011, 14:46 IST