The teen who murdered Logan Mwangi won't have his sentence increased as the judge's decision is not 'unduly lenient'.
Craig Mulligan was aged just 13 when, along with Logan's mum Angharad Williamson and her partner John Cole, brutally murdered five-year-old Logan and then dumped his body in the river.
WalesOnline reported he was sentenced to life detention with a minimum of 15 years before he can apply for parole for his role in the offending.