Kristy Bamu, from Paris, was found dead in Newham, east London, on Christmas Day in 2010.
The boy had 101 injuries and died from being beaten with a metal bar and drowning, the court heard.
His sister Magalie Bamu and her boyfriend, Eric Bikubi, both Congolese and aged 28, of Newham, deny murder.
Prosecutors told jurors of acts they described as "depraved", "wicked" and "cruel".
Mr Bikubi admitted manslaughter on the grounds of diminished responsibility, a plea not accepted by the prosecution.
Story continues... http://www.bbc.co.uk/news/uk-england-london-16427840
And people wonder why I despise religion.
