Yan, esteemed associate professor, and Qi's research partner, co-author of papers, shot in Caudill Labs building.

. Campus lockdown and manhunt follow the incident; investigation ongoing to uncover motives.

Qi's cryptic social media posts express frustration with work, colleagues, and PI, potentially linked to the tragic event.

 UNC Police Chief collaborates with law enforcement to gather evidence and determine the shooting's context.

Qi's online posts reveal struggles with self-worth, work pressures, and conflicts within academic environment.