HOUSTON — A man was shot and killed Tuesday by a gun store employee in southwest Houston, police said. Around 3 p.m., investigators said the man walked inside Carter's Country gun store, located at 11800 Wilcrest Drive, with a "bladed object," went straight to the cash register and started taking money. Police said an employee confronted the suspect and fired two shots. After being shot, investigators said, the suspect left the store, leaving behind a trail of blood. .......