15 M.R.S. §701: Criminal prosecutions by indictment; excepted cases

No person shall be held to answer in any court for an alleged offense, unless on an indictment found by a grand jury, except for contempt of court and in the following cases:

1. Use of charging instrument other than an indictment. When a prosecution utilizing a charging instrument other than an indictment is expressly authorized by rule of court; or

2. District Courts and courts martial. In proceedings before the District Court, the District Court acting as a juvenile court and courts martial.