Erin's ex and the father of her baby, Dylan Hinchey isn't all too happy with her having baby DJ to begin with. They share the custody and he's clearly not thrilled with the prospect of sharing the responsibility of a kid – financial and otherwise. He's one of the few people to see Erin before the murder, and since we now know that he isn't the biological father of DJ, he had a plausible motive to commit the crime. As seen in the preview of episode five, he, Jess, and an unknown third person are apparently harboring a secret that might tie into the murder of Erin. Needless to say, he's a strong contender to arouse our suspicions.