Police said Armando Pena, 44, approached Gladys Gonzalez, 60, as she was arriving for work at an apartment complex, The Miami Herald reported Tuesday.

Pena punched Gonzalez in the face, knocking her to the ground, and sped off in her white Ford Taurus, police said.

The incident was reported by off-duty police officer Omar Grass, who saw the Taurus speed off and tended to the injured woman before paramedics arrived.

Police said Pena returned to the scene with the stolen car 12 minutes after the incident and told police he was the one who struck the woman and stole the car. They said he admitted to smoking crack cocaine before the attack and cited "drugs" as the reason for his actions.

Pena said he turned himself in because he "felt bad.''