Whether the Illinois Appellate Court's decision rested on an adequate and independent state-law ground that barred Supreme Court review.
Holding
No. The state appellate court's decision fairly appeared to rest on federal law, so the Supreme Court had jurisdiction.
Reasoning
Under Michigan v. Long, a state-court judgment that appears to rest primarily on federal law, or to be interwoven with federal law, is reviewable unless the state court plainly states that it rests on adequate and independent state grounds. Rodriguez argued that Illinois provided greater state constitutional protection, but the appellate court made no such plain statement.
The Illinois Appellate Court did not cite the Illinois Constitution, did not invoke state constitutional doctrine generally, and relied on cases grounded in the Fourth and Fourteenth Amendments. The Court therefore treated the judgment as a federal Fourth Amendment ruling.