Molt v. United States

determining whether Guam's laws regarding inspection of imported agricultural products is preempted by the Plant Quarantine Act of 1912 | effective waiver of counsel in the abstract terminates once specific attorney appears on behalf of accused; accused must be informed of availability of counsel and rewaiver of right to counsel must be obtained before interrogation may proceed | "assumption on non-litigated issues are not precedential holdings binding future decisions.’’