Case closed.
Four of the horses were found painting camouflage and tied to an oak tree.
The third horse, Credit Card (sorrel with rocking V), body was found. He had been shot in the head, throat slit, and cut into pieces. A 18 year old was trailed and put on bail. Currently being trailed for other charges - stealing.
There is a Facebook page in memory of Credit Card. On hell of a horse. R.I.P.