An eight-year veteran of the D.C. police force was indicted on nine counts of sexual assault in cases involving three women, the U.S. attorney’s office announced Thursday.

Prosecutors allege that Larry Seay, 37, a 3rd District patrol officer, assaulted the women while on duty and in uniform on six occasions between Sept. 11, 2006, and July 22, 2010.

A D.C. grand jury indicted Seay on Wednesday, and a judge issued a bench warrant for his arrest. Seay turned himself in during a hearing Thursday in D.C. Superior Court, and a judge released him after ordering court supervision, requiring him to stay away from the alleged victims and demanding that he turn over any firearms in his possession.

Seay’s indictment and charges were made public after his court appearance. His next appearance is scheduled for Sept. 16.

According to the indictment, Seay approached the women on the street and ordered them to follow him to a more secluded location. At that point, Seay allegedly threatened each woman, led them to fear arrest and sexually assaulted them.

James Word, an attorney for one of the women, said his client is on probation after an August arrest for sexual solicitation. She was working the streets on the night of the alleged attack, Word said. “She’s had a lot of emotional problems because of this,” he said.

The Post generally does not name victims of crimes.

Seay was charged with three counts each of second-degree sexual abuse while armed, possession of a firearm during a crime of violence or dangerous offense, and attempted fourth-degree sexual abuse with aggravating circumstances.

A spokeswoman for the D.C. Public Defender Service could not be reached Thursday for comment.

D.C. Council member Jim Graham (D-Ward 1), whose ward includes the 3rd District, wondered why it took years to bring an indictment against Seay. “Why did this take so long? We should have some explanation of this,” Graham said.

William Miller, a spokesman for the U.S. attorney’s office for the District, declined to comment on the case.

Seay, of Southeast Washington, is the 18th D.C. police officer to be arrested this year on charges that range from murder to receiving stolen property, according to police spokeswoman Gwendolyn Crump. Last year, 17 D.C. officers were arrested, she said.

Crump declined to comment on Seay’s police career and the case. A police source said Seay often worked the overnight shift.

Seay’s police powers have been revoked since 2010, Crump said.

Staff writer Clarence Williams contributed to this report.