medical leave in govt service

if you face injustice, you can file a petition in the court of law

You are not telling the whole truth. Absenting from work is not a criminal offence.

Rule 3(1) (ii) and Rule 3(1) (iii) of Central Civil Services (Conduct) Rules, 1964, relates to all time maintaining integrity, devotion to duty and to do nothing which is unbecoming of a Government servant and reads as follows:

Rule 3 - General.

(1) Every Government servant shall at all times--

(i) maintain absolute integrity;

(ii) maintain devotion to duty; and

(iii) do nothing which is unbecoming of a Government servant.

In this case,  If the absence is the result of compelling circumstances under which it was not possible to report or perform duty, such absence can not be held to be willful.

Absence from duty without any application or prior permission may amount to unauthorized absence, but it does not always mean willful. There may be different eventualities due to which an employee may abstain from duty, including compelling circumstances beyond his control like illness, accident, hospitalization, etc., but in such case the employee cannot be held guilty of failure of devotion to duty or behavior unbecoming of a Government servant.

In a Departmental proceeding, if allegation of unauthorized absence from duty is made, the disciplinary authority is required to prove that the absence is willful, in absence of such finding, the absence will not amount to misconduct.

Case Reference Krushnakant B. Parmar  Vs. Union of India (UOI) and Ors.

I think KSRTC is Kerala Government. There is a communist government there re-elected after 5 years of rule. They will not take such drasctic action as dismissal without benefits just for an authorized absence. I feel the whole story is not disclosed.