You can't "subpoena" evidence, you subpoena live witnesses, or people to produce evidence. Since Brady v. Maryland (1963), prosecutors have to turn over any po

You can't "subpoena" evidence, you subpoena live witnesses, or people to produce evidence. Since Brady v. Maryland (1963), prosecutors have to turn over any potentially favorable evidence to the defense. The defense can of course ask to see the evidence in any criminal case. In a civil case, as the defense counsel you would have a chance to review the evidence in the discovery phase.