vial. and he notes that a nurse was prepared to testify she had made that hole in the vial as part of her usual routine when she drew blood from avery. >> so the fact that there was a hole in the top of the vial is normal. >> and regarding teresa's car key, not found until the seventh search of avery's trailer -- why was that key missed during the other searches? >> primarily because of where it was located in a small bookcase that wasn't searched. and if it was, it was just kind of looked at. >> why not do the thorough search earlier? >> i guess part of it is because we didn't lock and load on steven avery. we went in there, did that first search, but we had 12 more buildings and four more residences to search. so we had a lot to do. >> still, it wasn't just when the key was found that has avery supporters skeptical. it's who found it. these two men. lieutenant james lenk and andrew colburn of the manitowoc