The case of a Canadian diplomat's son charged in a double killing in Miami has been put over for an expected plea deal.

After conferring with the judge, the prosecution and the defence said Marc Wabafiyebazu should now be ready to plead Feb. 19.

Miami police arrested Wabafiyebazu, of Ottawa, on March 30, 2015, after a shooting that left his 18-year-old brother and another teen dead. He was 15 at the time.

His mother is Roxanne Dubé, a longtime Canadian diplomat who was consul general in Miami at the time of his arrest.

Police say the teen confessed to going with his 18-year-old brother to rob a drug dealer and the robbery went sour.

As a result, they charged him with felony first-degree murder, which carries a possible life term.

There's no allegation the younger sibling shot or threatened anyone.