What You Don't Know Can't Hurt You: Supreme Court to Address Knowledge Requirement for Firearm Offenses [April 19, 2019] [open pdf - 730KB]
From the Document: "Perhaps the most well-known aspect of the federal framework of firearm laws is the Gun Control Act's prohibition on the receipt or possession of guns by persons who fall into specific risk-related categories. Under 18 U.S.C. § 922(g), convicted felons, fugitives from justice, aliens unlawfully present in the United States, and certain other persons are prohibited from possessing, receiving, shipping, or transporting in interstate commerce any firearms or ammunition. And a separate statutory provision subjects those who 'knowingly' violate Section 922(g) to criminal penalties."
CRS Legal Sidebar, LSB10290
Congressional Research Service: https://crsreports.congress.gov/