Employee Misrepresentation - Does our company get liability for cheating our client using this fake degree employee?

@Dinesh Divekar
Thanks a lot friend for your kindness and taking time to answer our query.
That employee brought in a spy camera (attached to his t-shirt button) on his resignation day.
Our HR(who already knows that he had submitted fabricated documents) helped him in writing resignation letter ( becoz she was excited that our company is going to get payment (2000 SGP dollars as per bond) and he had it recorded using his cam.
He's claiming that if "our consultancy is aware of misrepresentation why would a HR help him in writing a resignation letter instead of terminating him instantly ? "
We got to know about this spycamera through one of our employee who is a mutual friend of that bad employee.
We would certainly close this case and forget everything.The reason why we are much concerned is because of his spy cam recordings.
Any suggestion to counter attack this issue ?

Dear friend,
You are adding new twist whenever you write your post. Now the latest twist is about this spy camera!
However, we need to know what kind of recording he has done and unless we check the video footage, no further suggestions can be given!
If he were to use the video footage against the company, he would have used by now. Why was he lying dormant all along? Why this "mutual" friend has raked up the case now? Does he have any vested interest in doing this?
Thanks,
Dinesh Divekar

@Dinesh Divekar
So in this case , as our HR and employees helped him in writing resignation letter we have to accept that our HR and employees aren't aware of this misrepresentation to counter attack and to defend ourselves and make it look like our employees arent aware of this fabrication and thats why they helped him.
Moreover if we accept that no background check was done and our HR and employees arent aware of misrepresentation till he resigned out of the company ,
I guess , our company is accountable for legal action as we didnt do a background check before deploying him to the client. And court would certainly ask whats the point in doing a background check after the employee left the company and its been more than 5 years !
Additionally he sent us a clip of video that proves that "we are aware of misrepresentation" . So we gotta accept that we are aware of it , if we accept it , our HR and employees had intentionally helped him in writing a resignation letter. We got stuck !
Please suggest a counter idea for this.

No friend , this is a long issue. As you are asking us for some information and providing solutions we are spilling everything what exactly had happened on that day , and possible outcomes of this case. We wanted to state facts so that people would help us to win this case (if filed , or blackmailed by him)

Delete this thread please.Waited enough for answers.