In U.S. v Robinson, what does a lawful custodial arrest allow regarding the search of the person?

In U.S. v. Robinson, the principle established is that a lawful custodial arrest permits a full search of the person being arrested as an exception to the warrant requirement. This ruling is grounded in concerns for officer safety and the preservation of evidence. When a police officer makes a lawful arrest, they have the authority to conduct a thorough search of the individual to ensure that no weapons are present and to seize any contraband or evidence that may be on the person. This search can be conducted without a warrant because it is considered a reasonable action directly associated with the arrest itself.

The rationale behind this exception is that the need to protect law enforcement and the integrity of the arrest process outweighs the individual's privacy interests at that moment. This doctrine allows officers to conduct searches to uphold public safety and enforce the law effectively without needing to acquire additional warrants at the time of the arrest.