This is a solid example of a question wherein no relevant information is divulged at all, but answer, that too legal, is expected.
The salient points required to be divulged are:
1.What is meant by 'family'.
2. What is the cheating,harassment and intimidation alleged? When did each one of them take place? Whether the name(s) of person(s) or their identities or at least designations known to the questioner?
3. What is the connection or relationship between the 'son' and the corporate entity named in the question? What is the perversion or illegality alleged? Why should any company "force" a person to commit suicide? What is the 'blackmail' alleged?
Being old, senior citizens, with low income and such other domestic information are totally irrelevant to the question.
In an open forum like this, it is quite possible for the questioner to be afraid or hesitant to divulge details. But without details nobody can provide even suggestions. The questioner may consult a local lawyer, with all relevant documents and copies of 'complaints' stated to have been lodged, and seek advice, if not interested to disclose fuller particulars.