http://www.newsweek.com/first-ever-rogue-isolated-black-hole-spotted-binary-explosion-study-1676325

Astronomers have confirmed the existence of a free-roaming black hole for the first time ever.

It's been thought for some time that wandering black holes, offset from the centers of galaxies or flung away from their neighbors, could exist. The trouble is finding them. But after poring over data from more than 10 years ago, scientists now think that they have done just that.