Julie Howard was a character that appeared in the episode There Will Be Blood in The Mentalist and was revealed to be a Red John accomplice.
Julia was also Jason Lennon's partner in his killing spree, where she would find vulnerable women and take them to her house before passing them off to Jason to have him rape and kill them. Julia was tortured and murdered by Lorelei Martins for information regarding Lorelei's late sister Miranda's rape and murder, which Julia took part in to help Red John and Jason.