A District police officer has been indicted on charges of sexually abusing three women and threatening them with his service firearm while he was on-duty.

The nine-count indictment alleges that 37-year-old Larry W. Seay assaulted one woman in September 2006 and again last April, and two other women in separate attacks in July 2010.

Seay approached the women on the street, ordered them to follow him to a secluded area and forced the victims to perform sex acts while making them fear they would be arrested, according to prosecutors.

Prosecutors said Seay was on-duty and in full police uniform at the time of the incidents.

All three of the women had arrest records for prostitution related charges in Washington, D.C., according to court records.

Seay is an 18-year veteran of the department and a patrol officer in the 3rd District. Police spokeswoman Gwendolyn Crump wrote in an email that Seay's police powers were revoked last year.

"It's appalling to me that a member who has served on the Metropolitan Police Department for 18 years would be engaged in this kind of conduct," Chief Cathy Lanier said in a statement.

Seay turned himself in Thursday and was released on "high-intensity supervision" after an arraignment hearing, said Bill Miller, spokesman for the U.S. Attorney's Office for D.C.

No attorney was listed for Seay in court records. A phone number for him could not be located.

Seay is charged with second-degree sexual abuse while armed, attempted fourth-degree sexual abuse and related firearms offenses.

Miller declined to say whether Seay knew any of the victims.

The indictment indicates that Seay has been charged with sex crimes in the past, but public records do not show any previous convictions for sex offenses and Seay is not listed in the national sex offender database.

Crump referred questions about the indictment to prosecutors, and Miller said he could not comment on Seay's prior record.

U.S. Attorney for D.C. Ronald Machen said that Seay "is accused of betraying the public trust by targeting victims for sexual assault" and the indictment "shows that no one is above the law."

He is the latest District police officer to be charged with a crime. Lanier told WTOP last month that 16 officers were arrested in the first half of this year, compared with 17 arrested in all of 2010.

Officers charged this year include Richmond Phillips, who is accused of killing a woman and her daughter in Prince George's County, and Aisha Hackley, who allegedly stole $43,000 from an elderly fraud victim whose case she was investigating.

A status hearing in Seay's case is scheduled for Sept. 16.

Staff Writer Scott McCabe contributed to this report.