Chad: What's going on and what next?

A leading critic of Chad's military leader, Mahamat Déby, has been killed in a shootout with security forces, that's according to officials Yaya Dillo's death comes after the government blamed him for a deadly attack on the country's security agency. He had denied the accusation. Several others were killed following that attack. What's going on?Also, fresh calls for a proper investigation into the killing of 21-year-old Agnes Wanjiru and a letter to King Charles.And a Cameroonian student who fled Ukraine tells us what life is like for him, two years after the conflict began.