As a noun.
The perpetrator quietly stalked away under the cover of darkness.
A perpetrator is someone who commits a crime or illegal action. An example of this word used in a sentence would be, "The police brought the perpetrator down to the station, and returned the stolen purse to a very relieved Mrs. Smith."
The perpetrator got away, this time.
There was a robbery last week but the police have caught the perpetrator.
Perhaps the next witness will give a better description of the perpetrator.
My mother is single. The police haven't a single clue as to the perpetrator's identity.
The investigators were persistent in finding the perpetrator even though the case was labeled as "dead".
pepperation
Most perpetrators of atrocities are never brought to justice.
The word 'perpetrator' is a singular, common, abstract noun; a word for the behavior of a person or a description of a person designated as responsible for a wrongdoing.
You just used the word acolytes in a sentence. Even saying, "can the word acolytes be used in a sentence", you are using that word in a sentence.
a sentence with the word"rivulet"
An alleged perpetrator is only under suspicion until proven that they are a perpetrator. The word 'alleged' is a legal term used when they have no evidence to prove the individual they suspect is otherwise proven by the law there is evidence they are a perpetrator. Example: If someone called you a liar and gossiped enough to tarnish your reputation then you could try and sue them, but, if they say that you are an alleged liar there is no clear cut evidence you are.