BATON ROUGE - Sheriff's deputies arrested a man who shot and killed a pregnant teenager, killing her unborn child, too, Saturday night.

Chad Blackard was booked into jail on feticide and homicide charges.

Deputies said Blackard was sitting in the backseat of a car driving on Siegen Lane near McCann Drive, between I-10 and Airline, when he fired a shot inside the car. The bullet hit the victim in the back.

The teenage victim, 17-year-old Karrington Smith, was 25 weeks pregnant. Smith and the unborn child died.

Before she died, deputies said Smith suggested the gun was in her purse when it went off but detectives later learned that was not what happened. 

Deputies said Blackard was playing with a semi-automatic handgun to show off, and it fired. Blackard told deputies the gun "went off" while he was trying to reposition it. Later, he said he may have squeezed the trigger as he was "readjusting it."

Blackard, 23, of Walker, also faces charges for illegal use of weapons.