Wilson v. United States

How later courts describe this case

• affirming conviction despite the assumed fact that board members had not met the residency requirements, even assuming these requirements were mandatory rather than directory
• the prosecution must present “substantial evidence which would tend to establish the trustworthiness of the statement”
• "shall" usually denotes imperative, but court may consider background circumstances, context of statute, and intent of Congress
• a defendant's plea of guilty to a particular offense does not waive privilege of self-incrimination as to other offenses arising out of same transaction