BOCA RATON, Fla. -- A woman who told police she was an off-duty officer is being charged by police with kidnapping and fraud.

Rachel Lyndsee Otto, 21, of Boca Raton, allegedly pulled over Michael Mellin on Tuesday and ordered the man out of a car and handcuffed him, police said.

A community officer from Boca Raton saw the incident and stopped because he believed that there had been a vehicle accident, according to reports.

Otto told the community officer she was an off-duty deputy for the Palm Beach County Sheriff's Officer. Otto, who was wearing fatigues and had a military-style haircut, told the officer she was making an arrest and was waiting for police backup to assist her.

The officer saw Mellin, 20, handcuffed and being held against a black Ford Mustang, according to police. Otto reportedly released the handcuffs when the community service officer ask for more identification.

Mellin told police that Otto walked over to his car and asked him for his driver's license and registration, police said. Mellin said he saw Otto, who he thought was a man, put on a utility belt. Police said the belt contained mace and handcuffs.

Boca Raton police arrived and recognized Otto, who has been arrested nine times since 2004, the Palm Beach Post reported. She told Boca police that she was making a citizen's arrest because the man had cut her off in a road-rage incident.

A woman who was a passenger in Otto's vehicle was also questioned by police. The woman told him that she had been living with Otto for a week and thought she was a man, according to police.

A man who had been assisting Otto was also questioned. The man told police he had pulled over to help Otto because he believed he was assisting a man from the sheriff's office make an arrest, according to police.

Otto, a computer web designer, is the granddaughter of NASCAR co-founder Edgar Otto.