Collin L. Johnson v. Roger B. Copinger, Warden, Maryland Penitentiary

Collin Johnson, a Maryland state prisoner, seeks a certificate of probable cause to appeal from an order of the district court dismissing his petition for habeas corpus on the ground that in a previous petition Johnson had deliberately withheld grounds for relief then known to him.

In 1964 Johnson filed a petition in the district court, in which he sought to allege various deprivations of his constitutional rights in the course of the proceedings leading to his 1963 convictions for armed robbery. The petition was dismissed for failure to exhaust state remedies. Two subsequent letters to the…