In the 1963 case Corey v. United States, the Supreme Court ruled on an issue related to tax evasion and fraud. The defendant, Mr. Corey, was charged with evading taxes by concealing his income through a complex scheme involving multiple corporations he controlled. He argued that since these corporations were separate legal entities from himself, their incomes should not be considered his personal income for tax purposes. The court disagreed with this argument and upheld his conviction for tax evasion. It found that although corporations are generally treated as separate legal entities under law, they can be disregarded in cases where they are used to commit fraud or evade taxes. This ruling established a precedent in U.S law: when individuals use corporate structures primarily to conceal their own activities rather than conduct legitimate business operations of the corporation itself - such as using them solely as conduits for personal transactions - those corporate forms may be ignored by courts when determining liability.

In the dissenting opinion for Corey v. United States, it was argued that the majority's decision to uphold a conviction based on evidence obtained through wiretapping violated Fourth Amendment rights against unreasonable searches and seizures. The dissenting justices believed that the use of wiretap evidence should be considered unconstitutional unless a warrant had been issued before its collection. They contended that allowing such practices would set a dangerous precedent, undermining citizens' privacy rights and potentially leading to widespread abuse by law enforcement agencies. Furthermore, they disagreed with the majority's interpretation of federal laws regulating wiretapping, arguing these were intended to protect individuals from unwarranted invasions of their privacy rather than provide authorities with another tool for gathering evidence without proper judicial oversight.