Savvas Savopolous, 46, was a successful businessman, living in a beautiful £2.9m mansion in Washington DC, with his wife Amy, 47.
Their two daughters were away at boarding school, but in May 2015, their son Philip, 10, was off school, recovering from concussion after a go-karting accident.
The couple were well liked, devoting a lot of time and money to charity.
That month, though, Savvas was excited by a new venture. A keen martial arts fan, he was preparing to open a new karate studio in Chantilly, Virginia, an hour from their home.
On 13 May, Amy asked Nelly - her housekeeper of more than 20 years - if she could clean the karate studio.
Agreeing, Nelly arranged for another housekeeper - Veralicia ‘Vera’ Figeuroa, 57 - to clean the…