In cases where identification is the primary issue, the court must carefully examine the objective basis for identification and not simply accept a witness's assertion of certainty at face value. Where accused persons provide alibis, the state has a duty to investigate and disprove those alibis. Failure to investigate an alibi, combined with weak or inconsistent identification evidence, means the state has not proven its case beyond reasonable doubt. A conviction based on unreliable identification evidence where the accused wore items obscuring facial features, where witnesses did not previously know the accused, and where alibis were not investigated, is unsafe and must be set aside.