Antoinette Frank (born 1st January 1970) is a former Louisiana state police officer who was convicted of the murders of three persons.

Frank had an unstable childhood, but there was one thing that was clear to her since she was a small girl: she wanted to become a policewoman.

As a teenager and, later on, young adult, Frank suffered from being a member of a broken family: her brother was a law fugitive, her father would appear in her life only occasionally, and Frank became distressed about these issues, needing psychiatric help.

According to author Chuck Hustmyre , a former policeman himself, when Frank applied to become a cop in Louisiana, she lied about her psychological and psychiatric condition in order to be hired as a policewoman.

Frank served in the Louisiana state police for less than one year. During a shooting, she met her future boyfriend, an alleged drug dealer named Rogers LaCaze , who had been badly injured during the shooting and who required help from Frank that night, as well as hospitalization.

Frank and LaCaze fell in love quickly. The couple shared a passionate relationship. Perhaps feeling that LaCaze brought her the solace she needed in life, Frank became so infatuated with the young man (who was 18 at the time), that she even let him drive her police car around.

According to police records, on March 4, 1995, police headquarters in New Orleans received a 911 call about a robbery taking place at a Vietnamese restaurant. When they arrived at the place, three bodies were found, two of them belonging to Vietnamese persons, and a third being that of officer Ronald Williams.

Antoinette Frank had obtained an off-duty job as a security guard at the restaurant along with officer Williams, who considered her to be a friend.

Frank arrived to the scene minutes after the first officers to arrive were there, and she proceeded to study the scenario where the murders took place.

But Frank became a prime suspect, based mostly on her relationship with LaCaze, who had a long list of events in his police record, and also on the fact that she and Williams both worked as security at the restaurant.

Frank's father had stayed at her home not too long before the robbery, then he disappeared. The fact that the police found a human skull with a bullet hole in his head buried under Frank's house not long after her father's disappearance, also helped her become a prime suspect of the restaurant murders.

According to police investigations, at about 2 AM of that fateful March day, Frank and LaCaze showed up at the restaurant, killing officer Williams. Then, they proceeded to torture restaurant workers Ha Vu , a 25 year old woman, and Ha Vu's 17 year old brother, who remained unidentified.

After killing the siblings, Frank and LaCaze stole the money from the restaurant's cashier machine and escaped before the police arrived.

Antoinette Frank was convicted of three counts of first degree murder and jailed immediately afterwards. As required by law, she lost her job as a policewoman.

In 2004, former cop Hustmyre released a book named "Killer With a Badge", which is based on Frank's life and the restaurant murders.