The ex-boyfriend of a New York City woman shot dead Wednesday as she pushed their infant daughter in a stroller has been arrested and charged with killing her, police said Friday.

Slain mother Azsia Johnson�s family identified suspect Isaac Argro as the baby�s father and said he routinely abused Johnson, beating her during her pregnancy and threatening to kill her.

Argro, 22, is charged with murder and criminal possession of a weapon, police Commissioner Keechant Sewell said. Information on a lawyer who could speak on his behalf was not immediately available.

Johnson, 20, was shot around 8:30 p.m. Wednesday near the intersection of Lexington Avenue and 95th Street on Manhattan�s Upper East Side. She was pronounced dead at a hospital.

The 3-month-old in the stroller was not hurt, but was taken to a hospital for medical evaluation, police said.

(AP)