We know that you’re dying to know who “A” might be! Don’t worry — we’ve got our crack team of sleuths on the case, picking up even the tiniest clue for your mystery-solving pleasure. Here are the hints from PLL, Season 1, Episode 19, “A Person of Interest” (February 28, 2011) that may help us solve this thing for good!

Suspect #1: Caleb
Why he might be “A”: Looks like our suspicions were right about this guy! We don’t yet know who he was talking to on that cell phone (probably Jenna judging by the trailer for next week's episode), but he clearly has been giving information about the Marins to someone. Could he be working for “A”?

Why he might not be “A”: Caleb seems to have real feelings for Hanna, as he even revealed secrets about his home life to her. And he seems conflicted when talking to that mystery person on his cell. So we doubt he has what it takes to be “A.” (Or maybe we just refuse to believe that someone so cute could be so evil!)

Suspect #2: Jenna Marshall
Why she might be “A”: Jenna still looks like the leading candidate for “A.” This week, we see her toying with Ezra, which forced Aria to confess to what actually happened with the firecracker. And we still don’t know what was in that bag that Ian gave her. But we’re guessing it wasn’t always empty!

Why she might not be “A”: Spencer and Toby were both fooled by that prank in the hotel room, where they were led by “A” to believe that Jenna was staying there. So perhaps someone is trying to set up Jenna. And maybe she just wanted Mr. Fitz to help her with her story and not something more. But we’re having trouble believing that she’s just a struggling artist...

Suspect #3: Ian Thomas
Why he might be “A”: It now seems plausible that Ian could have planted that trophy with his own name on it, knowing that the girls would take it to the cops and get in trouble. And it would make sense that Ian might be “A” in that final scene (when “A” is watching the girls at Spencer’s house on video), since Ian would have easy access to the Hastings’ abode. What a creep!

Why he might not be “A”: All that new information about Melissa’s other pregnancy appears to give Ian an alibi in Hilton Head. But we still feel like the guy just can’t be trusted. And maybe he's got Melissa in on his scheme...

Check out who we thought "A" was last week right here.