UK courts
The 16-year-old faces a minimum of 27 years in prison.
Stacey Worsley's son Toby died of a rare cancer at the age of six.
The girls were 13 and 14 when they killed Angela Wrightson.
Charlotte Huggins was believed to be the first person killed in London in 2019.
He wants to try to overturn his conviction.
The 16-year-old was jailed for life this week.
The player has served half of his six-year sentence.
Sir Peter Openshaw also told of the risk of "memory adjustment".
He was known as Tony Montana after Al Pacino’s movie crime kingpin.