A man died in northwest Houston early Saturday morning after another man struck him in the head with a rifle trying to prevent him from stabbing someone with a screwdriver, Houston police said. The case will be heard by a grand jury, said Victor Senties, Houston police spokesman. The victim, who was not identified, was partying with several other people in the 14500 block of Hempstead Highway around 1:30 a.m. when he and a second man got into a disagreement. The victim produced a screwdriver, the second man produced a rifle and a third man tried twice to prevent the altercation from escalating, including taking the rifle from the second man and striking the first man in the head with it. The victim, who suffered blunt force trauma to the head, died at the scene, Senties said.