In a major verdict, a Paris court has sentenced a former Rwandan doctor, Eugene Rwamucyo, to 27 years in prison for his role in the horrifying 1994 genocide in Rwanda, where nearly a million people were killed in just 100 days. This sentence marks the end of a long, drawn-out search for justice, as Rwamucyo had been wanted by Interpol for over a decade before his arrest in 2009.

The genocide in Rwanda was one of the most shocking mass killings of the 20th century. In just three months, e...