types of searches. we know they may be looking for that hard drive because that is still missing, something that wasn't in the computer at the home of the shooters when fbi investigators searched there. so this is an ongoing search that could take days, we're told, here at the lake, poppy. >> ana, what about farook, one of the terrorists, what about his former neighbor, enrique marquez? this is someone, to be clear, who has no formal charges brought against him. he did purchase two of the guns used in the attack. anything new on him? >> reporter: we have learned that he's talking a lot to investigators, poppy. he voluntarily is providing information that appears to be incriminating of himself. he even told investigators, we've learned, according to sources telling cnn that he and farook together made pipe bombs sometime in the past. he told investigators at the time they were more like hobbyists, experimenting with