I think that Van Pelt is connected to RJ somehow or maybe even her father is RJ. In the episode when the guy, who was killed in Mexico wrote "He is ma ..." he might ment Heisman, who was a famous football coach and his full name is John Heisman which gives us the connection with Grace's dad who is also a football coach. He is from Iowa where there is a team called Iowa Tigers which may be connected with the poem "Tiger, tiger". The only thing missing is that we don't know did they ever met with Jane. Plus it's strange that O'Laughlin knew her dad.