Police nabbed a deranged man who fatally assaulted a young woman in Brooklyn this afternoon.

The 18-year-old girl was found dead at 2:27 p.m. on East 102nd Street near Seaview Avenue in Canarsie.

The man allegedly fled in a gold Mercedes, taking police on a chase that ended when he flipped the car on Vermont Place and the Jackie Robinson Parkway, sources said.

Police grabbed the guy after a short foot pursuit through a nearby cemetery. Investigators are trying to determine whether the victim was the man’s step-daughter. The investigation is ongoing.