The Armed Career Criminal Act provides sentence enhancements for convicted felons who commit firearms crimes. Commit two or more violent crimes or drug trafficking crimes and your third gets you 15 years, minimum.
Edward Young was helping his neighbor sell her late husband's possessions when he found seven shotgun shells in a box. He put them in a drawer for safekeeping. Unbeknownst to him, he wasn't allowed to possess ammunition because he had been convicted of burglary-type crimes 20 years earlier.
Police came calling to investigate burglaries at an auto repair shop nearby. Young consented to a search, and of course they found the shotgun shells. For that, he received 15 years in prison.