brutality

Now, as his grandparents and mum begin lengthy prison sentences for their roles in his death, detectives and investigators have spoken about the brutality of the case and the effect it had on everyone involved.

The brutality quickly became frightening to all who watched.

The incidents grew into what Goodall called the four-year war, a period of brutality carried out by a band of male chimpanzees from a region known as the Kasakela Valley.

The brutality of the crime has sent shockwaves through the region, with thousands taking part in anti-femicide protests in Buenos Aires on Sunday.

She added: "I and all who loved Leo will live knowing of the brutality he suffered to his last breath."