Louisiana prisoner has his skull bashed in with a combination lock, the third attack in two months in which one inmate attacked another with a lock. The inmate’s mother sues but later substitutes the inmate’s two children, whom she’d just learned of. Prison officials: Too late. The children were the proper parties to file suit under Louisiana law, but they were substituted after the statute of limitations had expired. District court: That’s so. Fifth Circuit: Reversed. The case can proceed.