The subject comes for the discussion repeatedly. Anyway, you may click the following link which is about the ruling by the Delhi High Court:
As of now, there is no need to file a legal case as such. Just show the newspaper clipping to HR and that too if they ask for. Tell him to keep quiet until he receives a notice from his past employer.
Lastly, the spelling and grammar of your post. It is far from satisfactory. There are a large number of members who hold pride in quality writing. Possibly you could have thought of what jarring feeling they could get while reading the post. Therefore, the request is to maintain the professional standard of your posts.
26th July 2019 From India, Bangalore