In a separate incidence, Intermediate I year student Gowtham Kumar, 18, of a business college in Narayanguda, hanged himself to death.
Three more employees are the subject of disciplinary action by Punjab Police for failing to intervene and control the situation.
Mann, a 77-year-old former IPS officer who later became a campaigner for Khalistan, won the Punjab's Sangrur Lok Sabha seat on Sunday, marking his first electoral success since 1999. The time, according to observers, was ideal.