UPDATE:
After correctly filling out a form I found at the Nebraska DMV website and sending it in with a dollar I finally tracked down the last owner of the car. Basically I had it figured out from the beginning but I had to get official proof. The last title holder is Dodge county. I figured that since it was a sheriffs car and there was an auctioneer tag that had Fremont on the address. After contacting them and doing a little sweet talking to the right person they agreed to get a duplicate title and sign it over to me. Tonight I will send the reciept from the auction plus 14 bucks for the duplicate title and hopefully by the end of the week I will have the title in my name.