File protest petition in the court against the closer report. What police has reported, where they took the father and where was he for 2 3 days ?
What post mortem report says, cause of father death ? apart from poison, many other substance available to cause death.
Or police and doctor confined the post mortem, to viscera test only,
maintenance shall be 25% of salary. leaving job will serve no purpose. Maintenance can`t be avoided to non earning wife but in your case she is not entitled to as she her self deserted the home.
Ground of divorce - forceful marriage, father death, desertion and unwillingness to consummate marriage, threat of filling false cases, extortion etc.