Arthur Lajuane Taylor (defendant) pleaded guilty to possession of a firearm by a convicted felon, in violation of 18 U.S.C. § 922(g)(1). Taylor had four prior convictions: one for robbery, one for assault, and two for second-degree burglary under Missouri law. Given these prior convictions, the prosecution sought a sentence enhancement under 18 U.S.C. § 924(e), which authorizes sentence enhancements for individuals who violate section 922(g) and who have three previous convictions for certain crimes that present a serious potential risk of physical injury to another. Taylor opposed the prosecution’s request for the sentence enhancement on the ground that his burglary convictions did not involve conduct that presented such a risk. Under the terms of his guilty plea, Taylor had a right to appeal the enhancement. Taylor exercised this right and appealed.