SACRAMENTO, Calif. — For the second time in two weeks, an accused Aryan Brotherhood member has pleaded guilty in a 4-year-old case against the white supremacist California prison gang that is scheduled to go to trial in Sacramento in February. Patrick “Big Pat” Brady, 53, pleaded guilty to murder in aid of racketeering Wednesday in a Sacramento courtroom and faces a mandatory life sentence. Brady’s plea follows a Dec. 20 court hearing during which fellow Aryan Brotherhood member Brant Daniel, 49, pleaded guilty to murder in aid of racketeering and was immediately sentenced to life. Brady was c…