Strict liability, duty of care and ignorantia juris non excusat.

Right.

Mens rea ("guilty mind") itself is not a uniformly applied principle. But it's the name of the concept you were attempting to address above.

See also actus reus ("guilty act").

And note that in tort liability (as opposed to criminal liability) other standards may apply. "Strict liabilty" is more typically applied in civil law, though there are (I learned responding here) some applications in criminal law as well. In the latter case it seems to be similar to my understanding of prima facie violation. That is, the fact of a thing is a violation of law, regardless of intent.

Antitrust law is a civil matter, not a criminal one.

False.

https://www.justice.gov/atr/speech/criminal-enforcement-anti...