The detective, Andrew Mitchell, a 31-year veteran of the Columbus Division of Police, kidnapped one woman in July 2017 and forced her to perform oral sex on him, federal prosecutors said in an indictment that was unsealed Monday. On two separate occasions — in September 2017 and in the summer of 2018 — he forced a second victim to have sex with him, they said.

When Mitchell learned he was being investigated, he tried to tamper with witnesses and obstruct the investigation, and lied to federal prosecutors about having sex with prostitutes, according to the indictment.

Mitchell, 55, was charged with three counts of deprivation of rights under color of law (the term for a crime committed by a police officer on duty), two counts of witness tampering, one count of obstructing justice and one of providing a false statement to federal agents. If convicted, he could face up to life in prison.

“Mitchell, while acting under color of law, deprived victims of their civil rights, namely, the right to be free from unreasonable searches and seizures,” the U.S. Attorney’s Office for the Southern District of Ohio said in a statement announcing the indictment. In both cases, the women were transported to a location and forced to perform sexual acts “for their freedom,” according to the statement.

Mitchell, who is due in court Wednesday, plans to plead not guilty to all seven counts, his lawyer, Mark Collins, said Tuesday.

“We are definitely looking forward to vigorously fighting this case at trial,” said Collins, adding that the alleged offenses “didn’t happen.” Collins said Mitchell had been on restricted duty before his arrest Monday.

Police Chief Tom Quinlan did not return requests for comment Tuesday, but on Monday, he posted a statement on Twitter. “The community has every right to be disgusted by this news as well as anyone who wears this badge,” he said. “This officer will be held accountable for his actions.”

On Tuesday, the city attorney, Zach Klein, announced in a news release that his office would review all open cases involving Mitchell. Those in which only Mitchell and no other officers were involved will be dismissed, and previous convictions will be reviewed on a case-by-case basis, said Meredith Tucker, a spokeswoman for Klein.

Separately, Mitchell is also under investigation in connection with the fatal shooting of Donna Castleberry, 23, in August 2018 while he was investigating a prostitution complaint. (He was already under investigation for the present charges, the department has said, although he did not know it at the time.)

The police said Mitchell shot Castleberry three times while she was in his car after she stabbed him in the hand, according to a report in The Columbus Dispatch. The investigation into Castleberry’s death will go before a grand jury in April, a spokeswoman for the county prosecutor, Ron O’Brien, said Tuesday.

Mitchell will be testifying at the hearing about what occurred that evening and how it was a proper use of force, his lawyer said.

Castleberry’s family responded to Mitchell’s indictment in a news conference Monday. “We have been waiting for six long months,” said Bobbi McCalla, her sister. “I think that we are due answers.”

The vice squad he was in also came under scrutiny after the arrest of pornographic film star Stormy Daniels in July 2018.

This article originally appeared in The New York Times.