In 1995, however, Walker testified for O. J. Simpson during his trial for the murders of his ex-wife Nicole Brown Simpson and her friend Ron Goldman. Since evidence of Simpson physically abusing Brown in the past had already been shown by the prosecution, to the point that he had once been arrested and pleaded no contest for spousal abuse, Walker's colleagues accused her of betraying her advocacy for financial gain. The "National Coalition Against Domestic Violence" wrote of Walker's assessment of Simpson "[it] is absolutely the opposite of the assessment of most battered women’s advocates in this country.” During the subsequent civil trial, Walker testified against him instead for the Goldmans.