The police can enter a residence if:
- There are exigent circumstances, such as if they are in fresh pursuit of a suspect who just entered a residence, or there are circumstances where officers believe there is a threat to the safety of any person or loss of evidence would result if they waited for a warrant
- They are performing public safety functions, such as answering a 9-1-1 call, rendering first aid, preventing serious harm to a person or property, or locating a person in need of protection
- They have an arrest or search warrant
- They have the consent of a resident