RCMP said a 41-year-old man died in hospital on Feb. 11 following a shooting on the Long Plain First Nation on Feb. 2.
Family previously identified the shooting victim as Barry Myran.
Two 15-year-old suspects were taken into custody following the Feb. 2 shooting.
They were originally charged with attempted murder.
RCMP said officers continue to investigate.
Police have not yet released word on whether charges will be upgraded.
The suspects remain in custody.