Al-Waleed bin Talal
On 4 November 2017 , he and other prominent Saudis ( including fellow billionaires Waleed bin Ibrahim Al Ibrahim and Saleh Abdullah Kamel ) were arrested in Saudi Arabia , in a purge that the Saudi government characterized as an anti-corruption drive . 
<triplet> purge <subj> 4 November 2017 <obj> start time <subj> Saudi Arabia <obj> country