Searching for dog

If anyone here can help me... I lost my dog last july and was told recently that he was taken to our local pound. They took one look at him and declared him a pitbull, according to my vet he is a lab mix, they don't keep pitbulls.
I have also been told that a rescue group was making two trips a week between north central Indiana and the Indianapolis shelter with dogs. I am hoping my dog was among those but my pound denies any knowledge of my dog.
His name is Andre, though he might be called Tyson, and he was around 7months old at the time he also had a red nylon collar with a rabies tag from Three Points Vet I.D.# 080509.
If he's found a new home thats ok, I just want to know he's still alive!!!

Thanks

[email protected]