Describe a scene in which a detective follows a suspect through a crowded market, trying to remain inconspicuous while gathering crucial information

Describe a scene in which a detective follows a suspect through a crowded market, trying to remain inconspicuous while gathering crucial information. The suspect is aware of being followed and keeps looking over their shoulder, making it a tense game of cat and mouse as the detective tries to stay one step ahead. Eventually, the suspect slips into a back alleyway, and the detective must decide whether to pursue or wait for backup.