had never seen before. struck him as odd. if you keep scrolling, here you go. >> this is it right here. this is a tarp that was up. look at the bottom of the screen below the tarp area, that's the whole that the fbi dug searching his backyard. again, castro's home is a crime scene, but so is verdi adams who gave us this photo. the whole area surrounding here, this is the first glimpse we've seen. >> i know it's tough to see, but we saw these pictures in person. just to explain to you, the lighter part under the top the fbi put up so no one could see their work, you could see the boot, the bottom half of the fbi agents that were wearings this clothing. the agents could almost sit in the hole. that's how deep. here you go. this is a closer shot. how big approximately did he say the hole was?