Wow. So that couple may have helped find her?
Apparently the thought to look through the video they had recorded and noticed the van.
One good thing about modern social media is that it can get a lot of people involved who wouldn't even have known about the story in past times.
Along with that unfortunately comes some less than desirable things, like people picketing in front of a suspect's house, or otherwise getting in the way of the people actually working on the case.