The Niagara Regional Police now say they have a wanted man in custody.
27 year old Joseph Caligiuri turned himself in yesterday and was arrested without incident.
The woman was airlifted to an out of region hospital with serious injuries.
As of yesterday the woman's condition is listed as critical - no further update on her status is available at this time.
Police say the two knew each other.
Caligiuri is due in court for a bail hearing today.