Please advice me the way out

My father in law is in jc right now. he is running a company and his friend is running another company. but my father in law was a director of his friends company way back and duly resigned in the year 2011. now in the year 2013 his friends company has cheated with one customer of them. the customer was well known about the relation between my father in law and his friend. in the 2015 the customer was filed a complain to the local ps against my father in law as because the friend of my father in law was out of reach of the said customer. now the local ps delivered a notice of 41a crpc my father in law and he was honestly faced the ps regarding this. but at that time he did not consult with any lawyer regarding that. under the pressure of the customer and the oc of the ps and on good faith on his friend my father in law wrote a consent letter to help the customer to return the money he should get. but he failed to manage his friend and the local ps arrested him on 22.08.2016 and after pc of 8 days he his in jc for 12 days. during pc he cooperated with io by all means. please advice what to do for his bail and cleanchit. our lawyer is advicing to move to high court asap. please advice.....