Logan Mwangi's mum drastically transformed her appearance weeks after murdering her son in the hopes of avoiding recognition.
Angharad Williamson, 31, was sentenced to life imprisonment for killing the five-year-old alongside partner John Cole, 40, and their stepson Craig Mulligan, 14, whose identity was revealed this week.
Logan suffered catastrophic injuries similar to those seen in high-speed car crash victims before his body was dumped like "fly-tipped rubbish" into the River Ogmore near his Bridgend home.
Williamson was arrested on suspicion of murdering her son with Cole and Mulligan and was detained by police to await her first court appearance, the Mirror reports.
Footage taken from ITV documentary The Murder of Logan Mwangi reveals the murderer had bright pink hair upon her arrest Wales Online reported.
But weeks later she was seen with her tresses dyed brown.
The trial at Cardiff Crown Court heard evidence from Joanne Brooks, a serving prisoner at HMP Eastwood Park who was on the same cleaning team as Williamson, who had changed her name to "Angie".
Ms Brooks said: "She asked me if she knew who she was, had I heard of her.
“I hadn’t heard of her, I didn’t know her name or anything about her and she basically told me why I should know who she was.
"She said: ‘Have you heard of the Bridgend baby, the boy who was murdered and thrown in the river? I was his mother’... It was like she was telling me what she had bought from the shops…she said she was in there for her own protection.
“She said she had been offered an identity change, dying her hair, changing her name, going from glasses to wearing contact lenses.”
She said Williamson told other inmates "the lights would prove her innocence" and after she was charged with murder she called the women on her wing to a meeting.
Ms Brook said: "She stood at the end of the table, she announced she had been charged with murder and asked if we would support her because she was going to prove her innocence and she did not kill her child.”
Later that evening she described Williamson watching Married at First Sight Australia in her cell and eating snacks and laughing.
During her evidence at the trial, Williamson also described being taken to HMP Eastwood Park after being charged with perverting the course of justice.
She said: “I turned up, I got bombarded with abuse from the other girls.
“They isolated me off from everybody…They changed my name from Angharad to Angie and where I had bright pink hair they said: 'Dye your hair, here are some glasses, change your image, we’ll try to blend you in as much as we can'”.
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