An Evansville man is arrested for allegedly threatening a witness in a murder trial. Police responded to a home in the 1300 block of South Governor late Monday night. A woman in the home told officers that a man had knocked on the door, announced he was with the "EPD" so she opened it, he came in and punched her in the face. And after a brief struggle, the man ended up on top of her with a knife pointed at her chest. The woman told investigators that the man threatened her about testifying in a murder trial.