Hi Avi, 1) you cannot say silented.
Silenced is correct, but I'd suggest you to reconstruct the entire sentence. Also, not mouthed, it's mouth.
2) No, there's no commas required between either 'entire' and 'tainted' or 'tainted' and 'family'.
Arrest that person, and it's (their/his/her, better options) entire tainted family.