Nearly five months later, with the Clippers and Lakers set to face off in the NBA’s centerpiece Christmas Day game on Wednesday, resentment remains at the highest levels of Laker Land over how Leonard and his camp handled the process. And as if the growing rivalry between these intra-city teams wasn’t enough to make for a fascinating LA story, now there’s this previously unreported reality: According to three sources with knowledge of the situation, the NBA conducted a formal investigation of the Clippers last summer after complaints surfaced that Robertson had asked for improper benefits during the free agency process.