There isn't anything definitive because LE has never told us exactly what SB saw or didn't see that evening (or even during the day when JI was still there). Nobody knows what DB's brother saw or didn't see before then went to the store. Nobody knows what the brothers, especially the older one, saw or didn't see that entire day. So of course there isn't definitive of anyone seeing Lisa. There isn't anything definitive that anyone didn't see Lisa the entire day either, again based on how we know absolutely nothing about who came and went into that house for 24 hrs prior to BL going missing and what exactly they saw.
So save all of that, the only thing we have left as when LE considers BL actually went missing and unless something has changed, the time she went missing remains as it was back in October 2011, which was the evening in question.