Question

after murder of caser why does cassius send some of his fellow conspirators to announce liberty,freedom and enfranchisement at public places

Answer 1

cassius beleives that with caesar gone [dead] the country becomes free... he asks his fellow conspirators to spread the word that they've attained libert , freedom etc... in other that caesar is dead.. 

Answer 2

cassius must be beleiving  that with the death of caesar  the country will becomes free so he asks his fellow conspirators to spread the word that they've attained libert , corage,compassion ,wisdometc