The four, all aged between 16 and 17, face charges related to moving Morgan Huelin from a garage to a roadside on 5 July this year.
A fifth teen is expected to be charged early in the New Year.
One of the teens who appeared in the Youth Court earlier today also faced separate charges: importing a Class C drug, two counts of possessing a Class A drug, and one count of possessing indecent images of children.
None of the teens can be identified because of their age.
The case has been remanded to 5 January.