mexico city mexican authorities wednesday arrest former high-ranking official president enrique pena nieto party corruption investigation northern state chihuahua state governor say arrest extend streak corruption allegations dog rule institutional revolutionary party pri four former governors arrest charge year entrench corruption expect key issue runup mexico next presidential election 2018. alejandro gutierrez adjunct secretary presidency pri arrest joint operation state federal police chihuahua governor javier corral write post facebook chihuahua prosecutor office accuse gutierrez participate sophisticate scheme divert public fund 250 million pesos 13 million earmark educational program 2016. gutierrez present judge early thursday office say statement week mexican newspaper reforma publish report allege chihuahua corruption scheme funnel money pri campaign fund avenues fake contract workshops parent expensive software report base testimony prosecutors former state finance minister jaime herrera paper obtain gutierrez arrest take place coahuila week reject allegations interview mexican newspaper vanguardia say consider sue defamation think look initiate legal proceed say know repeat know even one official ex-official finance ... see things absolutely false gutierrez arrest contribute clear crimes political corruption attribute former governor sar duarte quez say corral national action party government determine whether others hold responsible funnel fund pri coffers 2016 corral add march mexican judge issue arrest warrant duarte suspicion embezzlement corral say fugitive justice spokesman pri immediately respond request comment pri rout 2016 regional elections lose several bastions include state veracruz tamaulipas quintana roo voters express discontent series graft scandals mexico arrest former high-ranking pri official corruption probe