A convenience store manager shot and killed a robbery suspect and injured another Friday after the men entered his North Las Vegas store and took the manager and several customers hostage. The two suspects held up the American Mini Market at 2564 Las Vegas Blvd. North on Friday afternoon, North Las Vegas police said. Then, the robbery suspects bound the store manager and several customers using zip ties and tried to rob them, police said. The manager, whose name was not released, escaped from the ties and retrieved a gun stashed inside the store. Shortly after 2 p.m., the manager...