Indianapolis - The Indiana Attorney General says his office is also investigating Planned Parenthood of Indiana.
The development comes after a health center aide was caught on video telling a woman who claimed to be a pregnant teen to lie about the age of the father.
A pro-life group member posed as a 13-year-old and secretly shot the video at a Bloomington clinic in June. She told an aide she'd been impregnated by a 31-year-old man.
The aide told the woman she could get an abortion in Illinois where parental consent is not needed and to not reveal the father's age.
Carter says if the investigation leads to criminal charges, it would be handled by a prosecutor. His office would handle any medical wrongdoing.
Planned Parenthood has fired the aide.