Tyler Myers was killed in a schoolyard in Salmon Arm in November 2008 and his body was discovered the following day.
Four years later, a 20-year-old man and 21-year-old woman were arrested and charged with first-degree murder.
Neither can be named because both were youths at the time of Myers's death.
A voir dire expected to last three weeks began in a Kamloops court on Monday to determine admissible evidence before an anticipated jury trial in August.
The evidence being heard is bound by a court-ordered publication ban. (Kamloops This Week)