A college basketball coach and her fiance were found shot to death in a car at their upscale condominium complex in Southern California, and authorities say they have no motive or suspects in the killing. Cal State Fullerton assistant women’s basketball coach Monica Quan, 28, and her fiance Keith Lawrence, 27, were found dead around 9 p.m. Sunday on the top floor of a parking structure at the complex, police said. Officers found their bodies after someone reported seeing Lawrence slumped over the wheel of his vehicle. Quan was found in the front passenger seat and Lawrence was in the …