new delhi indian police arrest two hindu farmers connection kill muslim man suspect smuggle cow slaughter house investigate officer say wednesday hardline hindu group gain prominence since prime minister narendra modi nationalist bharatiya janata party come power 2014 protection cow consider holy many hindu-majority country priority police find body ummar khan 35 friday railway track alwar district northwestern state rajasthan two suspect detain monday arrest next day say rahul prakash top police officer alwar clear case murder issue cow protection also find victim run cow-smuggling racket prakash say khan two accomplices use steal vehicle transport five cow attack six members self-styled cow protection force say side carry gun shoot khan shoot dead body throw onto railway track prakash say cow slaughter illegal india gau rakshaks cow vigilantes run loosely organize movement say mean prevent cattle smuggle tactics include highway ambush modi call do prevent attack people accuse eat beef slaughter cow year muslim farmer die injuries sustain assault mob alwar 180 km 100 miles southwest new delhi take cow home khan wife khurdisan deny husband lead cow slaughter accuse members right-wing hindu group affiliate modi party murder bring cow home milk meat want government protect children quote say hindi-language rajasthan patrika newspaper indian police arrest suspect cow vigilantes muslim kill