Police found him partially submerged, wearing dinosaur pyjama bottoms and a Spider-Man top just 250 metres from his home.
The youngster had suffered 56 external cuts and bruises, and “catastrophic” internal injuries, which were likened to a high-speed road accident.
Experts said the injuries could have only been caused by a “brutal and sustained assault” inflicted on Logan in the hours, or days, prior to his death. They also said the injuries were “consistent with child abuse”.
Logan was ‘dehumanised’ by his family
In the months and weeks leading up to his death, Logan had been “dehumanised” by his family, prosecutors said.
Logan’s stammer is said to have worsened, becoming particularly bad around Cole. He wet himself more frequently and began self-harming.
Friends of the couple said Cole told them he did not like Logan, and others said his attitude changed after becoming obsessed with the idea that Williamson had cheated with Logan’s father Ben Mwangi.
After Williamson gave birth to his own child, Cole was reluctant to let Logan see the baby and later claimed the boy had tried to smother the infant.
Medics made a safeguarding referral to the police after Logan suffered a broken arm in August 2020.
By March, due to concerns over Cole’s behaviour, Logan and his younger sibling had been assigned their own social worker.