The man appeared to drag the dog away from the scene
A man appeared to strangle his dog after it attacked a four-year-old boy in a Birmingham park.
The owner was walking the dog, described as a brown pit bull type, in Washwood Heath Park without a lead.
The man, described as Asian, about 5ft 10in (1.77m) and in his mid 30s, appeared to kill the dog in front of passers-by, police said.
The boy was treated at hospital after suffering small wounds to the head in the incident on 26 September.
West Midlands Police issued CCTV footage of the man leaving the park dragging the apparently dead dog and appealed for witnesses to the killing.
Earlier the animal had approached a group of young children playing and attacked the boy before running back to its owner.
He then appeared to strangle the dog and tried to put it into a bin bag before leaving the park shortly after 1915 BST, police said.
The boy was treated at hospital but discharged the same night.
Sgt Alan Hands, from Nechells Green police station, described it as a "horrific" incident.
He said: "It was terrifying for the little boy who was attacked and bitten by this dog which was not properly controlled on a lead.
"When it returned to the owner he appeared to destroy the dog with no regard for those who witnessed his actions or the animal itself without checking to see if the child was hurt.
"He is clearly not a responsible pet owner in any regard."
The owner was dressed in a cream-coloured hooded jumper and blue jeans.