How do I analyze this case applying the I.R.A.C. method?

Case #3 In July 1994 Elvis R. Stewart, an African American, began working for the Mcdonald's restaurant located inside the Wal-Mart store on Benson Boulevard in Anchorage, Alaska. Stewart's shift was from 7:30 p.m. until closing, the time of which varied. Stewart also worked at Taco Bell. Stewart's shift at Taco Bell was from 11:30 a.m. until 7:00 p.m. In order to work both shifts, Stewart carried a change of clothes and personal items in a duffel-type bag. He would change out of his Taco Bell uniform, and into his Mcdonald's uniform, in the Wal-Mart bathroom. He used the Wal-Mart bathroom, instead of the Taco Bell bathroom, because it was larger and less crowded with customers. Wal-Mart had a nationwide policy of stationing a member of its management team at its exits to check for receipts of purchases made by Wal-Mart and Mcdonald's employees, and to check for stolen items that might be concealed in their personal bags. Management conducted the checks before employees left the store at the end of their shifts. According to Stewart, sometime during his third week of employment, Hardy stopped him as he was exiting Mcdonald's at the end of his shift. Hardy asked to search Stewart's bag, and then proceeded to dump the contents of Stewart's bag onto the counter and look through it. According to Stewart, this type of bag search continued until mid-February 1995. Steward testified that he routinely objected to the searches. Stewart asked Hardy whether he searched certain people because they were black. Hardy answered yes. Question: Were the searches motivated by race discrimination? Explain