A former Citrus Heights legal assistant accused of smuggling drugs and contraband into Folsom State Prison on behalf of the Aryan Brotherhood prison gang pleaded guilty Monday to racketeering conspiracy and drug charges in federal court in Sacramento. Kirsten Demar, 46, entered the pleas in a case in which prosecutors say she posed as a paralegal and went to the prison with an attorney in August 2016 on a purported legal visit that actually was a ruse to smuggle methamphetamine, cellphones and tobacco to an Aryan Brotherhood leader serving time for murder. Demar, appearing before U.S. District…