Life What is Lewy body dementia, the disease Robin Williams’ widow called ‘the terrorist’ inside his brain? September 1, 2020September 2, 2020 Joshua Bote and Jayme Deerwester, USA TODAY Comments Off on What is Lewy body dementia, the disease Robin Williams’ widow called ‘the terrorist’ inside his brain? Awareness of Lewy body dementia has spiked since Robin Williams' death in 2014. But it's a complicated, often misunderstood neurological disorder.