So, you've completely skipped over the obvious point and made an unfounded supposition.
The Amish are Mennonite which one of the founding tenants is non-resistance. It's like pacifism, except less militant. These days the tenants of mennonism are bent and broken six ways to sunday, but the Amish as a sect are extremely devout and are more likely to hold to them than modern mainstream Mennonites.
As a general rule Mennonites will not own, touch, or allow weaponry into their home that has no legitimate peaceful purpose. Some own rifles specifically for hunting, but in general guns are a big no-no. Mennonites historically refuse to serve as police, in the military, or in ther government as they will take no role where they may as a matter of course cause someone to come to harm, or be responsible for others who would cause someone to come to harm. (Government is responsible for both military and police forces).
A recruitment drive for undercover officers in an Amish community is beyond absurd and would involve the recruiters being forcibly removed from the premisis (figuratively).
Caveat: I am a modern mainstream Mennonite, and we have none of the taboos against technology and serving in police, security, and government is accepted these days. But I for one hold strongly to our roots of non-resistance and reject anything that may put me in contact with violence (or the possibility of it) or weaponry.