The case against one of the defendants, Toksy Jacob, briefly went for mention before the Central Committal Court on Tuesday and was adjourned to April 4.
Jacob first appeared for mention in court at Waigani on February 16, 2016, after he was flown to Port Moresby from Kokoda with a 17-year-old defendant.
In Oct 2016, the court received the completed police investigation files in the case against Jacob.
The Committal Court is still assessing evidence in his case. This is to see if there is sufficient evidence to commit it for trial in the National Court.