Final answer:
SWAT teams, associated with police departments, are trained to use lethal force in high-risk emergency situations when necessary.
Step-by-step explanation:
The emergency teams trained in the use of lethal force when all else fails to resolve an emergency situation are typically associated with police departments, such as Special Weapons And Tactics (SWAT) teams. These highly trained units are equipped to handle high-risk operations that fall outside the capabilities of regular, uniformed officers. SWAT team members undergo specialized training in tactics, weapons, and negotiation skills to deal with dangerous situations, including hostage rescues, counter-terrorism, and armed confrontations.