A top leader of the white supremacist Aryan Brotherhood of Texas has pleaded guilty to racketeering conspiracy and admitted to participating in a systematic use of murder, robbery, arson, kidnapping and drug trafficking to support the gang.

The plea in federal court in Houston on Friday could mean a life sentence for Charles Lee Roberts. The 67-year-old Beaumont man is scheduled for sentencing Sept. 26.

Roberts was among nearly three dozen alleged gang members charged in a sweeping indictment unsealed in November that accuses them of crimes ranging from capital murder to drug trafficking.

A U.S. attorney's statement Friday said four of those named in the indictment have pleaded guilty to racketeering conspiracy.