so the conversation itself was based on questions like tell us what you saw is in the garage. what was the backyard looking like, what did the couriers personally tell you about themselves. information that wasn't released publicly. and so that was the interview generally with those types of details being elicited from them. >> israel keyes may have picked his victims at random. but his planning and execution was thorough and meticulous. long before he killed his prey, keyes would often stash kill kits or murder kits in an area he intended to carry out a murder. kits with guns, cash and tools to dispose of the bodies. we take you to one storage area used more than two years prior to the bloody murders of bill and lorraine courier. where are we? >> we're at an area called 68