Working on the street involves making constant judgment calls, partly based on our training, rules, and laws, but ultimately on the situation and suspects' actions. The bottom line is suspects act and we react. It's the nature of our job.
Out on a Limb
Ron Borsch has dared to take what many would call a bold, controversial stance, thus opening the door to lively debate involving criticism and praise. It's too early to prove or disprove his theory, but that will change if/when LE agencies adopt his single-officer entry idea.
If there's anything to be learned from history in law enforcement, it's that situation drives and sometimes changes police tactics. The deadly Austin, Texas, tower sniping in 1966 resulted in the formation of the SWAT concept. And Columbine resulted in rapid deployment by first responders. Today, both concepts are the universal standard in law enforcement.
The debate over single-officer entries in active shootings has only just begun. Yet, active shooters have been with us since at least the mid 1980s with the San Diego McDonald's massacre. Compared to the military, where the study of strategy and tactics is elevated to an honored position, law enforcement strategy and tactics study is in its relative infancy. However, while we've only just begun to seriously study police tactics, we, in law enforcement, are quick learners.