The 16-year-old reappeared in the High Court at Auckland on Wednesday charged with murder and aggravated robbery, after Whorrall was fatally injured at a bus stop in Meadowbank last month.
His trial has been set to begin on August 31, 2026.
A 32-year-old woman charged as an accessory after the fact to murder also appeared.
The woman indicated she would seek bail but did not make an application.
She has been remanded in custody and the boy has been remanded in a youth justice facility.
They will next appear for a case review hearing in July.
Family and friends gathered in Auckland on May 5 to plant a tree in memory of Whorrall, who was a PhD student of entomology at the University of Auckland.
His mother Carole Whorrall, visiting from the United States, joined his friends and flatmates to plant the pohutukawa, after a short ceremony organised by Ngāti Whātua Ōrākei.
