Mikey is Missing!

Mikey has been missing for over a week now. He is around 4 years old and I've had him since he was a baby. Someone had dumped him off close to our house in the country. I found him along the roadside on the way home from work one day, along with his brother who is still here. Mikey has been an outside cat most of his life, but I have a kitty door on the garage where he always hung out. I just can't understand what happened to him. I spent most of this past weekend walking thru the woods in our area and I've checked at our local shelter every day since he's been gone. I'm just bonkers over losing him. Hopefully someone local will see this who has seen this cat. I'm located in Coshocton,Ohio. REWARD!