A state trooper who was investigating prostitution at a truck stop near Harrisburg, Pa., was accused of tipping off the suspects.

A federal grand jury indicted Trooper Shawn Dillard, 39, of Harrisburg, on charges of making false statements, obstructing justice, facilitating interstate prostitution and conspiracy, the U.S. Attorney’s Office said Thursday.

If convicted, he faces a maximum penalty of 25 years in prison and $1 million in fines.

Prosecutors said Dillard tipped suspects about undercover agents, offered to reduce the charges against a woman in his custody in exchange for sexual favors and lied to federal agents about his activities.

He had been a member of an anti-prostitution task force that had netted 16 people for trafficking in prostitutes, authorities said.

Dillard’s lawyer did not return a telephone message seeking comment.

State police said Dillard has been suspended without pay.