What happened to Chow Tse-lok, who fell from HK's parking lot?

Chow Tse-lok, a 22-year-old student from Hong Kong University of Science and Technology, fell from Sheung Tak parking lot on the night of November 3 and died of cardiac arrest. Some Western media reported that he fell during clashes between protesters and the police, who used tear gas to disperse the crowd. Is that true?