I concur in Judge Danaher’s opinion. Though the erroneously admitted conviction was later affirmed, we cannot know that its admission in evidence was not prejudicial. Though that conviction may hereafter be admitted for the purpose of impeaching the defendant as a witness if he testifies at a new trial, we cannot know that there will be a new trial, or that the defendant will testify, or that a new trial will not result in an acquittal, a hung jury, or a conviction reversed on appeal. The possibility that there may be a valid conviction is not a good reason for affirming the present invalid one.