On March 4, a landlord will go on trial in Montgomery County District Court, Maryland, over charges he secretly recording three female tenants while they were nude or engaged in sexual acts with their boyfriends. The accused: Dennis Alan Van Dusen, 63, a lawyer with graduate degrees from Harvard. Small, hide-able spycams are cheap, and getting cheaper, with some models available for under $50 on Amazon and in hobby stores. Another man is due to go on trial in May for a similar crime, using the $499 Recluse Black Box.