The Tall Man
(2012)

There is no "Tall Man".

Julia Denning (Jessica Biel), is kidnapping the poor and mistreated children of Cold Rock and finding them homes with wealthy people who she feels will give them a better life.

When Julia is caught and put in prison she claims that she took the children and killed them all to prevent anyone for searching for them.

It is implied that there are people all over the world who work to kidnap children and place them with "better" families.

Thanks Melissa!