a few subtle things. For one, the conversation when hanna and mona were at radley where mona said you can't trust anyone not even family. I found that they kind of had this look like they were talking in code to each other.
When Emily found the teeth necklace in her bag, they all met in the girls room and hanna "accidentally" threw the necklace in the toilet. Looks like she did It on purpose. Hanna had access to people's teeth when she worked at the dentist office.
When someone new is convinced of being A, hanna goes in one direction or the complete opposite. It's either "there's absolutely no way" or "omg yes that's the only option" the other girls brainstorm and get clues and hints but hanna is either really against or really for someone being A.
When Calebs mom got into that car accident, she was super unphased by it. She got the picture text (no more or anything) what if it was Hannas minion sending her the photo showing the completion of the task. When Caleb showed up she put the phone down and acted not surprised at all, and had no reaction by the picture. Caleb knows about A...
Ending of 3x3 A is drinking vodka, we know hanna mentions vodka through out the series and Lucas probably made her a fake ID
A found out about the box of money AFTER hanna did. That money had been hidden there for a while. So why all of a sudden did it go missing. This isn't the first instance the second hanna finds something out, A finds out too. Hanna doesn't know about Aria kissing Wes, why didn't A use that. Hanna didn't know about Spencer's drug addiction... A didn't use it against Spencer. Emily wrote a fake letter to her parents about Danby, hanna found out and magically hanna A found out and sent it to her parents. Hanna also said Emily was getting her into Harvard and later turns out she doesn't need a fake letter for that.
Hanna loves food. Ironic that A messages come in food, teeth and in lipstick? awe know Hanna loves food and lipstcik, and worked with dental records.
Hannas mom wasn't supposed to go down for killing Wilden but had to because her suspected her of being A. Though Aria told Ashley it was her, mama Marin isn't stupid. She started investigating and figured out hanna is A and became black widow to clean up Hannas tracks. It was Monas idea to get Aria to convince Hannas mom that she was A, it was mona who helped hanna confess and then mona took the fall for it. Mona knew hanna can't go to jail for the sake of the game.
When Mona was in radley, she suddenly had a pair of tweezers after hanna left. Did mona take them or did hanna leave them? If she did leave them, did mona start planning her