He used the name 
Joao Pedro dos Santos.

He had been tracked for months by police. He carried multiple IDs, checkbooks and credit cards.

Was he preparing for a role?

He was preparing for a con, not a role, and he would win no awards. His name was actually Ricardo Sergio Freire de Barros, age 41, not Jack Nicholson, age 74.

Ricardo Sergio Freire de Barros

For some reason, Ricardo thought using a fake ID with Jack’s face would work. And if you study the faces in his other fake IDs above, I’m not sure any of the photos look like Ricardo.

Ricardo was arrested.

As stupid as it gets: Brazilian thief uses picture of Jack Nicholson on fake ID, Daily Mail>>