Why does Lisbon always wear a cross chain on The Mentalist?

Since the beginning of the show we are used to see Robin's character on The Mentalist, Teresa Lisbon, wearing a cross chain. She is never without it. But what is the reason why she always wears it?
Robin finally answered this question on whosnews.usaweekend.com
Click on Read More to read her answer.

Attention! Read it only if you want to know before the show eventually reveales it! ;-)


Thanks @LikeCheapWine , liery- RobinTunneyforum for the heads up.


Q: I am curious why The Mentalist star Robin Tunney always wears a chain with a cross. Her character doesn’t seem to be overly religious. Is this a personal thing?

“My character wears a cross because it belonged to her mother, who passed away when she was 14,” Tunney says. “My character was raised Catholic.” Tunney’s Teresa Lisbon, whose Catholicism flared when she began reciting Hail Marys while wearing a bomb vest near the end of Season 3, will be returning in the Sept. 22 premiere of Season 4. The new year picks up in the midst of mentalist Patrick Jane’s arrest in connection to the murder of a man he believes to be his wife and daughter’s killer, Red John.