[where's_the_Outrage?]

who said “embolden” future criminal presidents.

Almost at the end of the article:

Justice Ketanji Brown Jackson said she was worried that granting Trump's position for presidential immunity would "embolden" a president to act criminally "with abandon."

[Jonny7797]

Justice Ketanji Brown Jackson said she was worried that granting Trump’s position for presidential immunity would “embolden” a president to act criminally “with abandon.”

It would then be up to congress to impeach.

[GreyFriar]

Thank you. She was my guess as the justice most likely one to make such a statement.