NAPANEE, Ont. -- Ontario's police watchdog is investigating an incident in Napanee.

Last Tuesday Napanee O-P-P arrested a man who had been involved in a collision and had suffered serious injuries.

The woman driving the other vehicle died at the scene on Highway 2.

Police say that as a result of a parallel investigation, 42-year-old Andrew Slapkauskas of Belleville has been charged with first-degree murder, attempted murder, dangerous driving, and flight from police causing death.

He remains in custody pending his next bail hearing.

The O-P-P says it called in the Special Investigations Unit, which looks into all incidents involving police where death, serious injury or allegations of sexual assault are involved.