In resolving any dispute concerning a factor important to the sentencing determination, the court may consider relevant information without regard to its admissibility under the rules of evidence applicable at trial, provided that the information has sufficient indicia of reliability to support its probable accuracy. In pre-guidelines practice, factors relevant to sentencing were often determined in an informal fashion. The informality was to some extent explained by the fact that particular offense and offender characteristics rarely had a highly specific or required sentencing consequence. This situation no longer exists under sentencing guidelines. The court's resolution of disputed sentencing factors usually has a measurable effect on the applicable punishment.
More formality is therefore unavoidable if the sentencing process is to be accurate and fair.
Although lengthy sentencing hearings seldom should be necessary, disputes about sentencing factors must be resolved with care. When a dispute exists about any factor important to the sentencing determination, the court must ensure that the parties have an adequate opportunity to present relevant information. Written statements of counsel or affidavits of witnesses may be adequate under many circumstances. An evidentiary hearing may sometimes be the only reliable way to resolve disputed issues. The sentencing court must determine the appropriate procedure in light of the nature of the dispute, its relevance to the sentencing determination, and applicable case law.