Ontario's provincial police watchdog announced Friday that it is now investigating a Hamilton police officer in connection with the death of 19-year-old Yosif Al-Hasnawi.

The news comes just weeks after two Hamilton paramedics who face charges in the Good Samaritan's death were fired by the city.

Al-Hasnawi was shot on Dec. 2, 2017. Police say the Brock University medical sciences student intervened when an older man was being accosted in central Hamilton. He and his brother had just stepped outside the Al-Mostafa Islamic Centre, where they'd been participating in a religious ceremony.