The mayor of a Louisiana city near the state’s border with Texas abruptly resigned from her post days before authorities jailed her on suspicion of raping a boy while she served in office.

Misty Roberts became the first woman to be elected as mayor of DeRidder in 2018, and she was well into her second term in the position when she handed in her resignation – with immediate effect – to the local city council on Saturday.

The letter did not provide a reason for Roberts’s decision. But the day before, Louisiana state police had begun investigating an allegation that Roberts engaged in “sexual relations” with a minor who was too young to be able to legally provide consent, according to a news release from the agency.