This is the story of a vulnerable young woman. A woman who was killed by a man she trusted. A man who had been violent in the past and would go on to be violent many times again. Alisha Apostoloff-Boyarin’s body has never been found. Her killer, David Taylor, is serving a whole life tariff in prison. A place where he's gone on to commit more violence, including another murder. This is the first time the full story is being told with Sky News being given unique access to the police investigation. It's a story that has taken us from Manchester to County Durham to Derbyshire in search of the truth about what happened to Alisha. Along the way we find tragic missed opportunities – that might have prevented what happened. The biggest question of all remains - 'Where is Alisha?' #alisha #murder #davidtaylor #missingperson #skynews SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews Follow us on X: https://twitter.com/skynews Like us on Facebook: https://www.facebook.com/skynews Follow us on Instagram: https://www.instagram.com/skynews Follow us on TikTok: https://www.tiktok.com/@skynews For more content go to http://news.sky.com and download our apps: Apple https://itunes.apple.com/gb/app/sky-news/id316391924?mt=8 Android https://play.google.com/store/apps/details?id=com.bskyb.skynews.android&hl=en_GB Why not listen to one of our podcasts? This is Why, available for free here: https://podfollow.com/thisiswhy or Ed Conway's Stuff Matters, available here: https://podfollow.com/stuff-matters To enquire about licensing Sky News content, you can find more information here: https://news.sky.com/info/library-sales