A "wicked" predator who was caught on CCTV raping and killing an NHS worker on a park bench has been jailed for life.Mohamed Iidow attacked mother-of-three Natalie Shotter, 37, while she was passed out in Southall Park, west London, after a night out.Jurors had heard how the former child stage star had died from a heart attack caused by being orally raped "over and over again".Following an Old Bailey trial, Iidow, 35, was found guilty of her rape and manslaughter.Jurors were not told of his previous conviction for sexual activity by seeking to groom young people online.The court heard Ms Shotter was a beloved mother, sister, partner, daughter and former child star of a theatre production of Les Miserables.On Friday, Judge Richard Marks KC sentenced Iidow to life with a minimum term of 10 years and eight months.He told Iidow that taking advantage of "exceptionally talented" Ms Shotter when she was vulnerable and unconscious was "wicked and utterly reckless".