Would you happen to know of a link to this statement and if it had been verified by LE. If this is true at least we can know that Elizabeth was safe the night before. I have not or heard this statement.
Here's the link...it is the assistant coach who is quoted as saying they had been with Elizabeth until 9:00 the night before.
http://http://www.kwwl.com/story/19115767/elizabeth-collins-softball-team-honors-missing-cousins
ETA: try this link, the above one isn't working properly.
http://www.kwwl.com/story/19115767/elizabeth-collins-softball-team-honors-missing-cousins