MIAMI -- The 15-year-old son of a Canadian diplomat pleaded not guilty today to murder and other charges in a drug-related shootout that killed his older brother and another teenager.

The lawyer for Marc Wabafiyebazu entered the plea on his behalf to felony first-degree murder, attempted murder and other charges. The teen is charged as an adult.

Wabafiyebazu waived his appearance at the hearing, although he briefly showed up in court to meet with his lawyer, Curt Obront.

Obront said they look forward to their day in court.

Wabafiyebazu is the son of Roxanne Dube, a veteran diplomat who is now the Canadian consul general in Miami.

Her other son, 17-year-old Jean Wabafiyebazu, was fatally shot in the March 30 confrontation over a marijuana deal that also left 17-year-old Joshua Wright dead.

Dube, who was in the courtroom Monday, waved and smiled when her shackled younger son walked through.

Circuit Judge Richard Hersch set a tentative July 20 trial date, which would be extremely quick for a murder case to go before a jury.