AUGUSTA — A Kennebec County grand jury on Thursday indicted former Chelsea Board of Selectmen Chairman Carole Swan on four criminal charges alleging she solicited kickbacks from a snowplow contractor.

A prosecutor says her actions remain under scrutiny.

The indictment is the formal start of a criminal case against Swan, 53, and she will be asked to enter a plea of guilty or not guilty to the four charges at an arraignment in Kennebec County Superior Court.

The date of the arraignment was not available late Thursday.