Criminal Sentence 310: Apostrophe abuse

From a Web site:

"If the cyst is small, its' rupture usually occurs unnoticed."

This is an apostrophe violation!

"Its" is a possessive adjective, as in "Its tail is wagging."
"It's" is a contraction of the words "it is," as in "It's raining/It is raining."
"Its'" is not a word.