Mary Collins, a veteran interior designer with some 25 years in the Southern California market, testified as a defense witness on July 10, 1995 — the opening day of the defense case. Called by Johnnie Cochran and cross-examined by Marcia Clark, Collins was part of a string of witnesses that day who helped the defense build its narrative of O.J. Simpson's emotional state and challenge prosecution witnesses, alongside testimony from family members Arnelle Simpson, Carmelita Simpson, and Eunice Simpson.