Three people now are in custody in the slaying of the manager of the Family Dollar Store in Nashville, Ark.

Police say the three suspects plotted the May 26 killing of Robin Camp, 42.

A key factor in the alleged plot, police say, is that the suspects knew that security cameras displayed in the store did not work.

They were dummy cameras, with no interior working parts, meant simply to scare criminals.

These cameras are far more common than most of us suspect.

A quick search on Google for “fake security cameras” turns up scores of c...