1. Whether 18 U.S.C. § 922(g)(1), which categorically prohibits all persons with felony convictions from possessing firearms or ammunition, is facially unconstitutional under the Second Amendment.

2. Whether a criminal defendant waives the right to challenge the exclusion of evidence proffered during cross-examination of government witnesses by subsequently declining to introduce that same evidence during his case-in-chief.

3. Whether law enforcement officers who did not witness the commission of a crime may offer lay opinion testimony under Federal Rule of Evidence 701 identifying the defendant as the perpetrator based solely on a post-hoc review of surveillance footage and prior encounters with the defendant.

Question not identified.