would 2

Could you tell me the meaning of "would" in the underlines?

1. John was arrested by Mary on purpose. 2. John got arrested by Mary on purpose.

=

>My question was this
Perhaps there will be no difference in meaning between #1 and #2, if "on purpose" is placed between "was(got)" and "arrested", won't it? (John was(got) on purpose arrested by Mary.)
The poster's answer starts

>
There would be no difference in meaning, but the modifier would be placed awkwardly. I would place on purpose before got, or on purpose at the end of the sentence.

Q) I was wondering what "would" in the underlines means. (especially the second one)