In the Interest of W.B.

W.B. appeals a juvenile court disposi-tional ruling finding he committed the delinquent act of possession of alcohol under the legal age in violation of Iowa Code section 123.47(2) (1999). W.B. contends *545the juvenile court erred in concluding there was substantial evidence that he had possession or control of alcohol at a party. We agree and reverse.

I. Background Facts and Proceedings. On March 11, 2000, seventeen-year-old W.B. went to the home of a Mend. His Mend and another acquaintance told W.B. they planned to attend a party at a rural Calhoun county residence. W.B.’s friends asked him if…