In what case is there no need to announce the intent to arrest?

The correct choice is based on the premise that if the suspect is already aware of the officer's intent to arrest, there is no need for a formal announcement of that intent. This situation typically arises when the suspect has been informed of the arrest through prior interactions, demands, or other means, making a formal announcement redundant. For example, if law enforcement has already communicated their intentions or if the suspect is actively engaging with the officer regarding their arrest, then the announcement becomes unnecessary.

Other options might not hold the same necessity for an announcement. For instance, using minimal force does not inherently negate the need to announce an arrest, since the manner of force applied does not impact the legal obligation of announcing intent. Similarly, making an arrest in a public place or while in uniform does not bypass the requirement of announcing the intent, as the officer's visibility or the location does not imply consent or awareness from the suspect. Thus, the understanding that the suspect is already cognizant of the arrest is the key factor that eliminates the need for a formal announcement in this scenario.