Another element of prevention is knowing who is coming to the building at times other than services. Harvey says he's seen churches, in particular, rent out rooms for Alcoholics Anonymous, Narcotics Anonymous, and gang rehabilitation meetings. That can be good for the church's bottom line and also for the worthy groups involved, but churches need to know who is coming to these meetings and what they are doing inside the building. It's not outside the realm of possibility that active shooters or burglars could be using these programs to gain access and case the building.
To that same point, security experts recommend that houses of worship practice key control. That means making sure that people with keys really need the access and knowing who has the keys. Also, it's important to make sure that anyone who leaves the congregation returns the keys. If not, new locks may be warranted.
Preparation
Harvey says houses of worship need to develop plans for how emergencies—including active attacks—will be handled. It's important to have "but what if then thinking," he says. That means the unexpected can happen and one plan is not enough. "You have to have secondary and tertiary plans on what to do," he explains, adding that such plans are not just about what to do in the unlikely event of an active shooter attack. "This planning can also be used for medical events during services," Harvey says.
Perhaps the most important emergency planning that the leaders of any house of worship can do is to know the people in their congregation. Identify the people with lifesaving skills, including doctors, nurses, EMTs, police officers, and firefighters.
Harvey recommends that houses of worship arrange training for the congregation on things like first-aid and emergency medical response. "It's more likely that you will have a medical event than any other emergency. Classes like CPR and Stop the Bleed are great team builders for volunteers and families love doing them together."