What must officers do immediately after knocking during the knock and notice procedure?

After officers knock during the knock and notice procedure, they are required to demand entry. This ensures that the occupants of the premises are aware of the officers' presence and purpose, which is a critical aspect of adhering to the legal standards regarding searches and seizures. By clearly communicating their intention to enter, officers respect the rights of individuals while also following legal protocols that outline the proper steps for executing a search warrant. This process is designed to balance the need for law enforcement to carry out their duties with the legal protections afforded to individuals within their homes.

Waiting quietly would not fulfill the requirement of announcing their presence and purpose, which is a key part of the protocol. Forcing their way in or leaving the scene would also not comply with established procedures that prioritize both legality and the safety of all parties involved. Thus, demanding entry after knocking is the appropriate and legally mandated action for the officers in this scenario.