Which of the following can law enforcement do without a warrant?

Law enforcement has the authority to search the scene for victims and render aid without a warrant due to the necessity to protect life and safety. This action is prioritized in emergency situations where immediate assistance is needed. The primary goal in such instances is to secure the scene and ensure that any individuals who are in danger receive prompt medical attention. This action falls under the exigent circumstances exception to the warrant requirement, which allows officers to act quickly when there is a risk to life or safety, making it essential in crime scene investigation protocols.

In contrast, actions such as searching a suspect's home, conducting a full search of a vehicle, or seizing personal items typically require a warrant unless specific exigent circumstances are present that justify bypassing the warrant requirement. These actions are more invasive and do not have the same immediate necessity to protect life and safety as rendering aid does.