I have only seen a no knock warrant executed on television shows. Almost all were fictional. I completely understand the reason for their use. A few years ago one show’s depiction was a researched legal warrant issued to an address with the last number being a 6. However a 9 had spun around to be a 6 and the police hit an apartment with a couple and kids. No shots were fired but the couple, two adolescents, and a baby were roughed up and their apartment destroyed.
No knocks are given so evidence can’t be flushed or burned or the inhabitants given time to arm themselves. That is a very critical reason for one.
Another episode showed a mistake in writing the warrant and the police burst into the address on the warrant, but not the intended one.
The death of Breonna Taylor is another example of a lapse of police intelligence. They didn’t check to see if her new boy friend was the same man as her old one from six months ago and was in jail. Both episodes and reality in Louisville indicate the police did not take proper care. Too many people had a finger in getting the intelligence and not checking to verify the boy friend, confirming the address, and having one-person start and end the process by verifying everything all along the way. She died from laziness within the department.