Now he can't log into the device. The password he has doesn't work and it won't accept his finger print for the initial login. He purchased the device at Best Buy, and they won't take it back because its locked. He has called Apple and they couldn't help him. I can get the device into it's recovery mode as per https://support.apple.com/en-us/118430 but I can't get my PCs to recognize it through iTunes or the Apple Devices app. I assume this is because I'm not logged in to the correct Apple account, but the device itself doesn't have _any_ account associated with it.
Do I have any other options? Feel like I just bricked a brand new iPad by restarting it.
After you get into Recovery Mode and erase the iPad, it will reboot and be in Activation Lock with his account. Apple Support should be able to guide you on how to send the Best Buy receipt if you are unable to get thru Activation Lock.
But go to https://appleid.apple.com/ and check if his account can accessed with the info he provided so far.