Summary

Joseph P. Bradley Ex parte Nielsen — Opinion of the Court

In the present case, it is true, the ground for the habeas corpus was, not the invalidity of an act of congress under which the defendant was indicted, but a second prosecution and trial for the same offense, contrary to an express provision of the constitution; in other words, a constitutional immunity of the defendant was violated by the second trial and judgment. It is difficult to see why a conviction and punishment under an unconstitutional law is more violative of a person's constitutional rights than an unconstitutional conviction and punishment under a valid law.
Source: Wikisource

Joseph P. Bradley Ex parte Nielsen — Opinion of the Court

And assuming them to be true, can it be doubted that the adultery charged in the second indictment was an incident and part of the unlawful cohabitation? We have no doubt of it. True, in the Case of Snow we held that it was not necessary to prove sexual intercourse in order to make out a case of unlawful cohabitation; that living together as man and wife was sufficient; but this was only because proof of sexual intercourse would have been merely cumulative evidence of the fact. Living together as man and wife is what we decided was meant by unlawful cohabitation under the statute.
Source: Wikisource

Joseph P. Bradley Ex parte Nielsen — Opinion of the Court

As our object is simply to decide the case before us, and not to write a general treatise, we content ourselves, in addition to what has already been said, with simply announcing our conclusion, which is, that the conviction of the petitioner of the crime of unlawful cohabitation was a bar to his subsequent prosecution for the crime of adultery
Source: Wikisource

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