The 15-year-old son of a Canadian diplomat has pleaded not guilty to murder charges in a Miami drug-related shootout that killed his older brother.

Marc Wabafiyebazu 20150408Marc Wabafiyebazu is the son of a Canadian diplomat who police say was involved in a drug-related shootout that killed his brother and another teenager. (Handout/Canadian Press)

The attorney for Marc Wabafiyebazu entered the plea Monday on his behalf to adult felony murder, attempted murder and other charges.

Wabafiyebazu waived his appearance in court. Circuit Judge Richard Hersch set a tentative July 20 trial date.

Wabafiyebazu is the son of Roxanne Dubé, the Canadian consul general in Miami. Her other son, Jean Wabafiyebazu, was fatally shot in the March 30 confrontation over a marijuana deal that also left 17-year-old Joshua Wright dead.

Two other young men also pleaded not guilty Monday in the case.

Police say the gunfire erupted after the Wabafiyebazu brothers tried to rob the drug dealers.