Gayathri, in her mid-20s consumed poison last night at her house and left for the all-women police station at Dharmapuram, police said.
She collapsed in front of the police station and some colleagues got her admitted to a nearby hospital.
She died during to treatment later, they said. Gayathri, hailing from Katpadi village in Dindigul district was upset as the senior woman official in the police station used to abuse and torture her.
Reportedly, she was also asked by her senior to do some domestic chores, police said.