The SIU is investigating after a man died in Markdale.
Grey County OPP were called to a home on Main Street West to help Grey County Emergency Services at around 1:30 a.m. Wednesday.
While on the way to the hospital, the victim went into medical distress.
The 43-year-old man was pronounced dead at the hospital.
The SIU has invoked its mandate. It does so whenever anyone dies or is seriously injured while police officers are involved.