Ultimately, the girls realize they've been framed when they are caught by the police with the very shovel used to kill Alison DiLaurentis.
The episode famously opens with Aria, Hanna, and Spencer sitting in a police interrogation room—filthy, covered in dirt, and looking like they’ve been digging for their lives. Watch Pretty Little Liars S02E12 DVDRip XviD-DE...
🤫 Can you keep a secret? Or will "A" make you pay the price? Ultimately, the girls realize they've been framed when