There are cases where families of birds (and a lot of other critters, really. Take the mountain lion, for instance) are misplaced by science and will eventually end up being moved as more genetic info is found about them. I really don't know about a crow and a mynah though...
I guess if it turned out that they were close enough to be able to produce an offspring, the offspring would still be sterile. Tell that person you know to try to get a pic or maybe, if she can draw, make a sketch of the bird?