What is the current state of the law in the context of police communications?

fellow officers about the foundation for the transmitted information." (citation and quotation marks omitted)); United States v. Jensen, 425 F.3d 698, 704-05 (9th Cir. 2005) ("Where law enforcement authorities are cooperating in an investigation, the knowledge of one is presumed shared by all. The rule exists because, in light of the complexity of modern police work, the arresting officer cannot always be aware of every aspect of an investigation; sometimes his authority to arrest a suspect is based on facts known only to his superior or associates." (citations, quotation marks, and alterations omitted)).