What happened to Partridge?
Patrick surely was a member of The Blake Association. He knows Tiger Tiger and he had a tattoo.
In Season 6 Episode 1, Jane took a close look at Partridge at the beach. Partridge was disturbed. He questioned Jane's behavior towards himself, asking "Why are you acting like this in the past days?"
After the scene, Partridge freaked out. He became paranoid. Does Jane know I am a member of the association? How much does he know? Why else would Jane inspect me like that? And he shared his concerns with someone else from the club, he was talking about leaving the association. Word got to Red John. Partridge wanted to be out, but he knew too much. He was a loose cannon and he could talk.
That is why Red John killed Partridge, and also sliced his skin to remove the tattoo, this was Partridge's punishment. Partridge was a disgrace to the beautiful community Red John formed. He dare could he ask to leave? This was also a message to other members of the association. No one leaves The Blake Association. And anyone who knew that Partridge wanted to leave, got the message.
When Lisbon came to house, Partridge said "Tyger Tyger". His last words were in hope to tell Lisbon the existence of such club.
