A jailer should take which action regarding the use of deadly force during an incident?

A jailer should prioritize the principle of using deadly force only when absolutely necessary. This aligns with the overarching guidelines and training regarding the appropriate use of force in law enforcement settings. The emphasis is on de-escalation and the preservation of life, adhering to policies that advocate for the minimization of harm.

When considering the implications of the other choices, the expectation is not that deadly force should ever be a common response, as always using it or using it to assert authority contradicts basic safety protocols and ethical responsibilities in law enforcement. Moreover, the concept of using deadly force only in emergencies suggests a reaction to an immediate and severe threat rather than a preventive or assertive measure, which does not fit the foundational principles guiding law enforcement actions. Thus, the correct choice reinforces the priority on safety, a measured response, and adherence to established protocols regarding the use of force.