Key legal question
Whether the constitutional complaint was admissible despite the availability of an appeal on federal law issues.
Extracted holding
The complaint was inadmissible insofar as the challenged grievances could be raised by appeal, because the constitutional complaint is subsidiary.
Extracted reasoning
Claims of wrong application of federal law, including denial of the right to evidence in an appealable civil case, must be brought by appeal; the constitutional complaint cannot be used as a substitute.