MG bro,
I'll try to clarify below.
What do you mean by knowingly or unknowingly?
There are two crimes you need to distinguish. One is producing fake certificate, another is killing.
If the patient died while being treated by the quack, it does not mean the quack must have intentionally killed the patient, although he had a previous crime of producing fake certificates. In that sense I used the word knowingly or unknowingly.


How about fake engineers?
I'd say what about them? I see fake certicates and resumes left and right.
Well, it depends I guess. If an engineer submits a fake resume or certificates/diplomas etc., unless his action injures a person or two, or kills them, nothing happens. The employers are the first ones to take action depending on the employee's performance.
My colleague claims he has Masters in Electronics and used to write English like a two year old. He got an opportunity to work as a technician and started soldering jobs. But he slowly moved up the ladder, became a design engineer in hardware. Now his certificates don't matter.
In other fields like civil engineering, there have been cases where bridges were poorly built and they collapsed, killing folks. I have heard of the company management being prosecuted.

I've heard of fake teachers in Nepal. I remember vaguely a teacher who had produced brilliant students and worked for 20+ years before the public found out he had not passed 10th grade. What to do with him? Nothing...


Speaking of fake resumes, I just wonder who has not learnt to brush up his/her resume? If you have not, just hurry up.