She is bleeding mercury, a sign that she is next on the Doctors' list.
Theo claims Stiles brutally murdered Donovan in cold blood. [S5E9] Lies of Omission
The heart of this episode is the devastating confrontation between in the pouring rain. Theo’s web of lies officially traps Stiles when he shows Scott the bloody wrench from the library. She is bleeding mercury, a sign that she
Terrified by his own power, Parrish locks himself in a jail cell to protect the town. Theo’s web of lies officially traps Stiles when
Scott believes Theo over his best friend. He refuses to listen to Stiles’ side, leading to a rift that feels like the end of the pack. The Chimera Crisis
Stiles killed Donovan in self-defense, but his guilt has kept him silent for weeks.
Both are identified as "failures" and executed by the Doctors.