Brian "Kato" Kaelin was a houseguest at O.J. Simpson's Rockingham estate and testified as a witness in preliminary, criminal, and civil proceedings. Addressing the night of June 12, 1994, he described hearing three loud thumps on his bedroom wall around 10:40 PM and Simpson's insistence on retrieving an unfamiliar dark knapsack before leaving for the airport. His account and credibility were contested: Marcia Clark questioned his prior statements, elicited accounts of the Gretna Green police call and a Christmas 1993 argument that had been omitted wholly or partly from them, and established that he could not account for Simpson's whereabouts from 9:35 to 11:00 PM, while Robert Shapiro used cross-examination to portray Simpson as calm and unangered that evening. Kaelin's testimony extended across multiple days, and questioning also examined his financial ties and the basis for his views of Simpson's relationship with Nicole Brown.