B Sandeep, who was deputed at Eturunagarm Station in Warangal district, shot himself last night, police said.
According to police, Sandeep had recently got married. However, the couple used to argue frequently over domestic issues.
He came to the police station at around 10 PM yesterday, pulled out his pistol and shot himself in the stomach, they said.
Sandeep succumbed to injuries while being taken to hospital, they said, adding that further investigation in the case was on.