Megan Harris / 90.5 WESA Pittsburgh City Council on Tuesday introduced legislation that would ban no-knock warrants, a move that would inscribe in city law a ban on a law-enforcement tactic that local officials say the city already doesn't use. No-knock warrants allow officers to forcibly enter a home without knocking or announcing their identity or purpose. The bill would essentially ban the practice by requiring police to knock and announce themselves before serving a warrant, then wait a minimum of 15 seconds to allow the person to respond and open the door. The legislation would also require that when executing a warrant, officers must wear a body camera and keep it on and recording before and after the execution of the warrant, and during any arrest or search of a person or property. Officers would also be required to be uniformed and immediately identifiable as a law enforcement officer.