(Middletown, Ohio) Middletown police say they have 33 year old Robert Salmon in custody after he allegedly held a man at gunpoint and demanded his wallet and cash at 1806 Casper Road.  After officers surrounded the house, they found Salmon with the wallet in his possession.  He was arrested and charged with Aggravated Robbery. He is being held at the Middletown jail awaiting arraignment Tuesday morning.