Which case involved discussions on Non-Productive Responses for K9 alerts?

The correct choice revolves around Florida v. Harris, a landmark case that specifically addressed issues related to the reliability of K9 alerts and the implications of non-productive responses, which occur when a K9 indicates on an area but no contraband is found. The Supreme Court ruled that a dog's reliability must be established if a K9 is to provide probable cause for a search.

In Florida v. Harris, the court examined the protocols surrounding K9 training and the records of a specific dog to determine whether the alerts were consistent with the presence of contraband. This case established the importance of documentation regarding a K9's training and performance history, emphasizing that a dog's non-productive responses cannot be dismissed outright but must be viewed within the context of its overall track record.

This legal precedent is critical for law enforcement agencies in understanding how to use K9 alerts as part of search and seizure operations, ensuring that the method remains constitutional and that the rights of individuals are respected during searches.