Catwalk Murders - Jim Richards Murder Mysteries, #44

Jim is asked to help protect a fashion designer. So Jim and Buck gather men from his security team to watch the woman whose life is threatened. They have one attack on the woman but the suspect was chased away, then during a fashion show Penny is walking the runway when a gunshot is fired at her. They have to catch the shooter. and eventually the case is solved. This is a novella, shorter than a novel, but longer than a short story.
This is a Jim Richards book number 45.