A New York teenager was shot to death Monday night while walking his pit bull-Rottweiler mix.

Brooklyn detectives do not know who killed 19-year-old Pharley Petigny while he was walking his beloved dog Jay in his Flatbush neighborhood around 7:00 p.m. Monday.

Authorities said after the teenager was shot in the head he staggered four blocks before collapsing on East 34^th street.

The Kingsborough Community College student, who worked two jobs while going to school, wanted to be a physical therapist, his younger sister, Suseley Petigny said.

Pharley’s father collapsed inside his home after hearing the news that his son was murdered.

The elder Petigny was taken to local hospital but insisted on seeing his son, whose dead body lay on a NY street covered by a white sheet, before going.