A man has been bound to the grand jury on charges he threatened a witness on the eve of his trial on felony assault charges.The defendant, Phillip H. Mooneyham, 20, was bound to the grand jury on charges of coercion of a witness, vandalism, highway graffiti and violation of an order of protection. He has been warned to stay away from the victim or face having his bond revoked and being placed back in jail pending his trial.His charges come after he allegedly showed up outside the home of a Tobitt Road woman who was set to testify against him the following day on felony assault charges. The woman was to be the key witness against Mooneyham and was going to testify he placed a gun to her head after becoming mad at her last year.