(Would be helpful to have the options)
Based on the information provided, it appears that the police may have probable cause to investigate further and potentially obtain a search warrant or arrest warrant, depending on the jurisdiction and other evidence they can gather. Probable cause is generally established when there is a reasonable basis for believing that a crime has been or is being committed.
In this scenario, John provided information that connects the digital cameras to the Best Buy robbery, which may prompt the police to investigate the source of the cameras and gather more evidence. The police may try to establish a connection between Steve and the robbery or gather more information about John's involvement or knowledge of the crime.
However, probable cause alone does not guarantee a search or arrest warrant will be granted. The police would need to present their findings and evidence to a judge or magistrate, who would then decide if there is sufficient probable cause to issue a warrant. The specific actions the police can take depend on the jurisdiction, applicable laws, and the strength of the evidence they can gather during their investigation.