Man found guilty of murdering wife in 2010, six years before he killed author fiancee Helen Bailey

A 61-year-old man has been found guilty of killing his wife in 2010, six years before he went on to kill his fiancee at their home in Hertfordshire. Ian Stewart denied killing Diane Stewart who died at their family home in Bassingbourn, Cambridgeshire, on 25 June 2010. The 47-year-old's cause of death was recorded at the time as sudden death in epilepsy (Sudep). Police reopened the case after Stewart, 61, was convicted six years later of the murder of his fiancee, children's book author Helen Bailey, whose body was found in the cesspit of the £1.5m home they shared in Royston in Hertfordshire. SUBSCRIBE to our YouTube channel for more videos:    / skynews   Follow us on Twitter:   / skynews   Like us on Facebook:   / skynews   Follow us on Instagram:   / skynews   For more content go to http://news.sky.com and download our apps: Apple: https://itunes.apple.com/gb/app/sky-n... Android https://play.google.com/store/apps/de... Sky News videos are now available in Spanish here/Los video de Sky News están disponibles en español aquí https://www.youtube.com/channel/skyne... To enquire about licensing Sky News content, you can find more information here: https://news.sky.com/info/library-sales