The event took place in Okara City on Attari Road.
The deceased and her brother got into a furious dispute after she failed her math exam.
Adil Hussain, the accused, shot her sister in a fit of wrath, killing her instantly.
Police arrived at the spot and took charge of the victim’s body after receiving the report.
Once at the Tehsil Headquarters Hospital, the body was moved for a post-mortem examination.
In response, the Hujra Shah Muqeem police have opened a case based on the mother of the victim’s complaint and have begun a manhunt for the accused.