Colin Mitchel and others appealed to the United States Supreme Court after they were convicted of violating a federal law that prohibited the importation of slaves into the country. The appellants argued that Congress did not have authority under Article I, Section 8, Clause 3 (the Commerce Clause) to pass such a law. They also claimed that their convictions violated due process rights because they had been denied access to witnesses who could testify in their defense. The Supreme Court rejected both arguments and affirmed the conviction on appeal. In its opinion, it held that Congress was within its constitutional powers when it passed this legislation as part of its power over foreign commerce and interstate trade. It further found no violation of due process since there was sufficient evidence presented at trial for them to be fairly convicted without any additional testimony from witnesses unavailable at trial.

In the case of Colin Mitchel and Others v. The United States, the Supreme Court was asked to decide whether a treaty between the U.S. government and certain Indian tribes gave them exclusive rights to hunt on public lands in Arkansas Territory that were otherwise open for settlement by non-Indians. In an opinion written by Justice Story, he argued that while treaties are generally considered sacred obligations under international law, they must be interpreted according to their plain language and not extended beyond what is actually stated within them. He further noted that if Congress had intended for this particular treaty to give Indians exclusive hunting rights over public land then it would have been explicitly stated in its text; however, since such language was absent from the document it could not be assumed as part of its meaning or intent. As such, Justice Story concluded that Indians did not possess any special privileges with regards to hunting on these lands which meant they were subject to all laws applicable thereto just like everyone else living there at the time