BS”D
Yes. Anyone with a history of abusive behavior (actual abuse, not being a child of an abusive home although children of such backgrounds need to be investigated carefully) or who has chas vesholom known to have committed molestation needs to be blacklisted. Marriage does NOT cure these problems.
Usually this behavior manifests itself in the teenage years or earlier – if the kid is the class bully or was suspected of something while serving as a camp counselor etc, it should be a major warning sign.