A handyman who killed a doctor and her daughter after giving them drug-laced smoothies before attempting to frame them for a murder-suicide has been jailed for life. Devious Shahbaz Khan, 52, pleaded guilty at Preston Crown Court in June this year to murdering Dr Saman Mir Sacharvi, 49, and her 14-year-old daughter Vian Mangrio, at their home in Burnley on …