stand. who said he could answer that precise question, because nathan told him everything. >> can you state your name? >> david smith was a fellow in may of nathan's at the county jail. he said nathan told him he researched ways to kill denise on his laptop. >> did he talk about how he was planning to kill his wife denise? >> well, at first he told me that he was thinking about some poisoning. or some type of potassium or something like that. >> according to the inmate, nathan said he ran a lot of aaron's on the day of the murder. to create an alibi, and -- >> he told me he presented some gifts. some valentine's day gift and stuff. to his wife and, so that everything would look fine. >> how important was david smith the jailhouse snitch? >> david smith said that nathan was worried, that a lady mike it's seen him while he was