Talking about the cover-up, Jefford said what they did was “careful and calculated and not the product of panic”.
“It is impossible to imagine the terror a five-year-old would feel suffering those horrific injuries inflicted upon him by those regarded as his family with the compliance of his mother.”
The concealment of Logan’s body in the river, was described as “heartless”, “calculated and orchestrated”.
Jefford told the trio they were “all responsible for Logan’s death and all the anguish that has flowed from it”.
“Because he was killed in his own home, it is not possible to be sure what has happened to him,” she said.
She described the injuries Logan suffered as “the sort of injuries seen in abused children”.
Logan, a previously “smiling, cheerful little boy”, died after suffering a “brutal and sustained” attack at home, leaving him with 56 “catastrophic” injuries, including extensive bruising to the back of his head and tears in his liver and bowel.
Cole was told he would serve a minimum term of 29 years in prison while Mulligan, would serve at least 15 years. All three were convicted of murdering Logan in July 2021.
Mulligan – who was able to be publicly named after a judge lifted an anonymity order, external – is not the biological son of Cole but he raised him from the age of nine months and considered himself a father figure.
On Wednesday, Williamson was seen briefly on screen with dark hair and glasses as she listened to the hearing from HMP Downview Prison in Surrey, alongside a mental health support worker.
She did not speak at the hearing and Coroner David Regan said he understood she “wanted to observe”.