Van Pelt is definitely a member of Visualize. It makes sense, she's been abused and is very open minded. And she's defensive when talking to Father DiBuono about Visualize. 

Maybe she's in conspiration with Haffner and maybe she met Craig due to similar interests, who knows...

Maybe she got in to PJs room at CBI, found the 7 seven suspects somehow and reported it and maybe she told him when she tracked the phones, who knows...