Toronto police were called to 2063 Islington Ave. on the afternoon of March 17 to investigate a shooting.
At the scene, police found 21-year-old Ahmed Siyad suffering from gunshot wounds. He was taken to hospital where he was treated for non-life threatening injuries.
A few hours later, police left the scene and then were immediately called back to the same address for a second shooting.
That second shooting would claim the life of Marfo, a 22-year-old Toronto man. He died in hospital two days after he was shot.
Police have since suggested that Marfo may have been shot as part of a retaliation to the earlier shooting at the building.
In the early hours of Thursday morning, police made a series of arrests in the Dixon Road and Kipling Avenue area, which relate to the Marfo investigation.
Today, police are scheduled to provide an update on the investigation into Marfo's killing at 11 a.m. CBC viewers can watch the news conference on the livestream on this page.
A week after the shooting, police announced that Siyad had been charged in connection with a pair of armed robberies that occurred earlier this year.
The allegations against Siyad have not been proven.