Walter Was the Only Witness to an Unprovoked Assault by Queenie

True/False

Walter was the only witness to an unprovoked assault by Queenie on June. June was attacked from behind and did not see who hit her. Queenie has denied she did it, but Walter told June that he saw her do so. When the case comes to trial, Walter is serving in West Africa with a non-profit organization and cannot be reached. Since June was there and has the direct evidence of a witness, she may tell the court what Walter saw.