Which is a permissible reason for obtaining a search warrant after an initial search?

Obtaining a search warrant after an initial search is permissible if consent is granted by an individual who has the authority or access to the property in question. Consent plays a critical role in the legality of searches, as individuals can provide permission for law enforcement or investigators to conduct further searches based on the presence of evidence or other factors. When consent is given, it legitimizes the investigator's actions and may justify obtaining a warrant if needed for further examination of the premises.

In contrast, the other options do not align well with the legal standards regarding search warrants. For instance, finding evidence in a public place does not necessitate a search warrant as there are no privacy expectations. Similarly, evidence in plain view can be seized without a warrant based on the officer's lawful presence. Lastly, the discovery of evidence after an initial search typically would lead to a need for a warranted search rather than authorize obtaining a warrant in the first instance, as it relates to the conduct of the original search. Thus, consent from an individual with access is the key factor that legitimizes further action to obtain a search warrant.