Origins of Hutu, Tutsi and Twa phenotype, genotype, cultural memory of inhabitants of Rwanda, archeology, and linguistics. Most Tutsis and Hutus carry the E1b1a paternal haplogroup, which is common among Bantu populations. More recent studies have de-emphasized physical appearance, such as height and nose width, in favor of examining blood factors, the presence of the sickle cell trait, lactose intolerance in adults, and other genotype expressions. Excoffier et al. (1987) found that the Tutsi and Hima, despite being surrounded by Bantu populations, are "closer genetically to Cushites and Ethiosemites". Another study concluded that, while the sickle cell trait among the Rwandan Hutu was comparable to that
Rwandan genocide between Hutu, Tutsi, and Twa. The systematic destruction of the judicial system during the genocide and civil war was a major problem. After the genocide, over one million people were potentially culpable for a role in the genocide, nearly one-fifth of the population remaining after the summer of 1994. After the genocide, the RPF pursued a policy of mass arrests for the genocide, jailing over 100,000 in the two years after the genocide. The pace of arrests overwhelmed the physical capacity of the Rwandan prison system, leading to what Amnesty International deemed "cruel, inhuman, or degrading treatment". The country's nineteen