The 15-year-old son of a Canadian diplomat plans to plead not guilty if charges are brought against him after an alleged drug deal in Miami turned into a gun battle that left his older brother dead and landed him in custody, where the teenager allegedly threatened to kill a police officer. Curt Obront, the lawyer for Miami Consul general Roxanne Dube’s surviving son, Marc Wabafiyebazu, called it a tragic case. Dube's ex-husband and the boy's father, Germano Wabafiyebazu, has said his 17-year-old son, Jean Wabafiyebazu , was killed when he went into a house to buy marijuana Monday, and that police arrested Marc. Scroll down for video . Jean Wabafiyebazu (left), 17, was killed and his brother Marc (right), 15, has been arrested after a gunfight erupted during a drug deal on Monday . High-ranking official: Their mother is Roxanne Dubé (above), the recently appointed Canadian Consul General in Miami . Germano Wabafiyebazu said his sons borrowed their mother's personal car, which has diplomatic license plates, to drive to the house but told their mother they were just going for a drive. He said he was told that Marc rushed into the house after hearing a gunshot. It was not clear whether Marc Wabafiyebazu would be charged as a juvenile or an adult but he is due in juvenile court on April 8. Authorities say he would not be protected by diplomatic immunity. Dube and her family, meanwhile, expressed condolences to the family of Joshua Wright, the other deceased victim, and said they just want to be there for the younger son. ‘Your grief is our grief,’ she said. ‘We can only hope that, in time, we will find common purpose towards diminishing the causes of such violent crimes. For now, we just want to be there for Marc, our incredibly caring son who loved his brother very much, and to say goodbye, ever so tenderly and quietly to Jean, our love.’ The Miami-Dade State Attorney's Office confirmed that another man, 19-year-old Anthony Rodriguez, was charged with second-degree murder and marijuana possession with intent to sell for his alleged role. Crime scene: In this photo taken on Monday, March 30, 2015, Miami-Dade police detectives work at a crime scene in Miami, involving the two teenage sons of Roxanne Dube, Canada's counsel general in Maimi . Troubled youth: The siblings' father said 17-year-old Jean (left and right) struggled with substance abuse . The Rodriguez arrest report says a second man, identified as 17-year-old Joshua Wright, was shot to death inside the house. Prosecutors also said Rodriguez was wounded in the arm in the shootout. The police report also quotes unidentified witnesses as saying Rodriguez brought two pounds of marijuana to the house and began to negotiate. ‘During the negotiations, both deceased victims became involved in an exchange of gunfire,’ the report says. Anthony Rodriguez (above) was arrested on charges of felony murder and drug possession . According to the Miami Herald, police believe the Wabafiyebazu siblings were armed with guns as they tried to rob a group of men during a drug deal at a home in the Coral Way area. The boys had reportedly agreed to purchase two pounds of marijuana at a cost of $5,000, and driven to the house under the guise of making said purchase in their mother's BMW with diplomatic plates. Police claim that their plan was to then rob the drug dealers. Gunfire broke out soon after they entered, and Jean and Joshua Wright were killed, while Anthony Rodriguez was wounded. Both Marc and Rodriguez were arrested under a Florida law that says anyone who participates in a violent felony that results in death can be charged with murder. In addition, Marc Wabafiyebazu faces charges of threatening a police officer while in custody, according to a separate police report. The boy is alleged to have said ‘he was going to kill (a detective) and that he would shoot him in the head.’ A second man was reportedly with Jean when he went to rob the drug dealers, though his identity is not known at this time. Dubé, a one-time Fulbright scholar, was appointed to her new position in November, but only arrived in Miami in February. She was previously Canada's ambassador to Zimbabwe from 2005 to 2008 and also served as a staff member for a Canadian Liberal cabinet minister for more than a decade. Bloody aftermath: The boys and a friend had driven to a house, pictured here with blood on the floor, to reportedly purchase two pounds of marijuana for $5,000 . Gunfire erupted soon after they entered, though Marc was in the car at the time . John Babcock, a spokesman for Canada's foreign department, said Louise Leger has been named acting Head of Mission on an interim basis. The boys’ father, Germano Wabafiyebazu, said he and Dube were divorced a few years ago and that their son Jean struggled with substance abuse. He previously told Global News that he does not think Marc had anything to do with this tragedy, and that he was just in the wrong place at the wrong time. He also said the boys kept to themselves, and did not have much of a social life. 'My wife told me they didn’t go out,' he said. 'They went to school, went home, went to school.'
Marc Wabafiyebazu, 15, plans to plead not guilty if charged with felony in connection to Monday's deadly shooting . Wabafiyebazu's 17-year-old brother, Jean, was shot dead, along with 17-year-old suspected drug dealer Joshua Wright . Wabafiyebazu brothers reportedly tried to rob a group of Miami drug dealers . Their mother is Roxanne Dubé, the recently appointed Canadian Consul General in Miami . The boys had driven to a house with a third friend to reportedly purchase two pounds of marijuana for $5,000 . Gunfire erupted soon after they entered, though Marc was in the car at the time . Anthony Rodriguez, 19, who was wounded, was also arrested on charges of felony murder .