THE BRONX - A domestic dispute took a deadly turn in the Bronx when a livery cab driver stabbed his estranged girlfriend to death.

According to police, Dionas Espinal was arrested Wednesday after he sideswiped the Honda Pilot of 20-year-old Katherine German with his green taxi, causing it to flip over on Pelham Parkway.

Investigators say the 31-year-old approached the overturned vehicle and proceeded to stab German repeatedly. He also confronted the unidentified man who was driving, and punched him in the face with a set of brass knuckles.

German, who is the young mother of the couple's 1-month-old baby, had an order of protection against Espinal, cops say.

Espinal is facing several charges, including murder, criminal possession of a weapon and criminal contempt.