The mother and stepfather of Logan Mwangi have been jailed for life for his murder, the battered body of the 5-year-old was found dumped in the River Ogmore, South Wales, last year.
Stepfather John Cole, 40, was told he would spend a minimum of 29 years in prison while the mother, 31-year-old Angharad Williamson was told she would serve a minimum of 28 years in jail.
A 14-year-old boy, who for the first time has been named as Craig Mulligan, was also detained for a minimum of 15 years, he was also found guilty of murder.
The mother and Mulligan were also convicted of perverting the course of justice.
Logan Mwangi, who was described as a "smiling, cheerful little boy", was found battered and beaten in the River Ogmore in Pandy Park on the morning of July 31, 2021.
Local police found Logan partially submerged in the river, wearing dinosaur pyjama bottoms and a Spider-Man top, approximately 250 metres from his home.
The young boy had suffered 56 external bruises and cuts, as well as "catastrophic" internal injuries which were likened to that resulting from a high-speed road accident.
Authorities explained how the severe injuries Logan endured could only have been caused by a "brutal and sustained assault" inflicted on the child in the hours, or days, prior to his death. Experts also stated that the injuries were "consistent with child abuse".
Logan Mwangi Was "Dehumanised" By His Family
In the months leading up to his horrific death, prosecutors said that Logan had been "dehumanised" by his family. They said that Logan's stammer had got worse, particularly when he was in the company of Cole. He had started to self-harm and wet himself frequently.
Friends of the family told authorities how Cole told them that he did not like Logan, others described how his attitude towards the young boy changed when he became obsessed with the idea that Williamson had cheated on him with Logan's biological father Ben Mwangi.
After Williamson had given birth to Cole's child, the stepfather was reluctant to let Logan see his new baby, even claiming later that Logan had attempted to smother the newborn.
Medical staff made a safeguarding referral to the police in August 2020 after Logan had suffered a broken arm.
Several months later, Logan and his younger sibling had been assigned their own social worker due to concerns over Cole's behaviour.
In June 2021, just a month prior to the death of Logan, the family was removed from the child protection register - meaning they believed there was no longer a risk of significant harm to the child.
A foster family whom the 14-year-old killer Craig Mulligan stayed with claimed to have heard him saying that he wanted to kill Logan. A support worker also told the court how they heard him singing: "I love kids, I fucking love kids, I love to punch kids in the head, it's orgasmic."
A few weeks before his death, Logan had suffered a broken collarbone but was never taken to receive medical treatment. On July 20, Logan had tested positive for Covid-19 and was locked in his bedroom with a baby gate preventing him from coming out.
Caroline Rees QC, prosecuting, said: "He had been kept like a prisoner in his small bedroom in the flat you saw, a room likened by Williamson as a dungeon."