The court, on its own motion or on motion of the state’s attorney or a person charged with a crime or convicted of a crime but not yet sentenced, may order, if the interests of justice will be served, that such person be examined, pursuant to the provisions of section 17a-694, to determine if the person is alcohol-dependent or drug-dependent and eligible for treatment under section 17a-696 or 17a-699. A probation officer may order that such an examination be conducted as part of a presentence investigation conducted pursuant to the provisions of section 54-91a.