Answer
COVID-19 led to Manafort's release to home confinement in 2020 because it made the risk of contagion in prison too high. The pandemic was spreading rapidly in New York City, where Manafort was being held, and prison officials were concerned about the potential for the virus to spread among the inmates. Manafort was released to home confinement on May 13, 2020, after serving nearly two years of his sentence.