Attorney James D. Tunick had never experienced anything like it.Five hours after Tunick urged the 7th U.S. Circuit Court of Appeals to overturn the prison sentence imposed on a client for conspiring to sell synthetic marijuana, the court ordered the man’s immediate release.Five days after that, the court ordered a new sentencing hearing for Tunick’s client, Mohammad Khan, and his co-defendant, Ruby Mohsin.The court on Tuesday held U.S. District Judge Charles R. Norgle erred in enhancing Kahn’s and Mohsin …