In the United States v. Hastings case of 1935, the Supreme Court ruled on a matter concerning federal income tax evasion. The defendant, Mr. Hastings, was accused of evading taxes by falsely declaring his income for several years as less than it actually was. He argued that he had not committed fraud because he believed in good faith that his declared income was accurate and did not intentionally deceive the government to evade taxes. The court disagreed with this argument and upheld his conviction for tax evasion. They stated that even if a taxpayer believes in good faith that their declaration is correct but it turns out to be false due to negligence or ignorance, they can still be held liable for fraud under U.S law. This ruling established an important precedent regarding tax evasion cases: taxpayers are responsible for ensuring their declarations are accurate regardless of whether any inaccuracies were intentional or unintentional.

In the dissenting opinion for United States v. Hastings, it was argued that the majority's decision to uphold a conviction based on evidence obtained through wiretapping violated constitutional protections against unreasonable searches and seizures. The dissenting justices contended that allowing such evidence would set a dangerous precedent, undermining citizens' privacy rights and potentially leading to widespread abuse of power by law enforcement agencies. They also pointed out inconsistencies in the court's reasoning, noting that while it acknowledged wiretapping as an invasion of privacy, it still allowed evidence obtained this way to be used in court proceedings. This contradiction demonstrated a failure to fully appreciate or respect the Fourth Amendment's purpose: protecting individuals from arbitrary invasions of their personal security by government officials.