Questions have been raised over the murder of Daniel Pelka, after his mother and stepfather were jailed for 30 years today.
The four-year-old was starved for at least six months before being beaten to death in March 2012.
Magdelena Luczak and her boyfriend Mariusz Krezolek were unanimously convicted of murder on Wednesday after blaming each other for the head injury which ultimately caused his death.
ITV News correspondent Juliet Bremner reports:
Eleven of the 12 jurors who found Luczak and Krezolek guilty of murder returned to the court today to see them receive mandatory life terms.
Both of you are in breach of what is probably the most important position of trust, as the parents of a small child who was entitled to their protection, their love and their care. Your breach of trust, Magdelena Luczak, is wholly irreconcilable with the loving care that a mother should show towards her own son.
Krezolek, 34, and Luczak, 27, were both jailed for life and ordered to serve minimum term of 30 years before the Parole Board can even consider their release.
Daniel's father said that the life sentences handed out to Luczak and Krezolek were "severe enough", but he only "wishes the same thing would happen to them, what happened to my son".
I am not relieved, not a single bit. I blame Magdalena and her partner. And also the social care and Daniel's school that they haven't reacted earlier - maybe this trtagedy could have been omitted. When we were a couple, Magda was a good mother. I think that, he had a bad influence on her.
After the sentencing, the MP for Coventry North West Geoffrey Robinson said that Daniel had been "badly let down" not just by an "evil stepfather and indifferent and selfish mother" but also by his school, health professionals and social services
Mr Robinson called for the director of children's services Colin Green to step down now, rather than in September as planned, saying:
He takes with him the indelible stain of Daniel's cruel death, which his department had failed to prevent. What human being, with the slightest understanding of children, would not have been concerned enough to take action to set alarm bells ringing? Those who failed Daniel must examine their own consciences, and conclude whether it is appropriate for them to remain in their posts.
Coventry City Council welcomed the sentencing adding that they will be conducting a review over why Daniel had not been protected.
Amy Weir, the chair of the Coventry Safeguarding Children Board told ITV News that it was "critical to get to the bottom" of the Daniel Pelka case, as it has had a "devastating affect on lots of people around him".
Children's Commissioner for England Dr Maggie Atkinson said that Daniel's murder is a "warning for us to keep vigilant".
The chief executive of the NSPCC Peter Wanless also added: "When adults are hell bent on destroying a child's life and doing all they can to deceive those around them, the criticality of questioning a child's behaviour and speaking out about it is more important than ever".