Ray is a musician capable of altering the psychological states of the people around him by playing music. He used this ability to draw his wife out of her catatonic state, resulting in other several instances of psychotic behavior in other people, including Dr. Lucassi and detective Nathan Wournos.
Ray's ability was a family trait. His grandfather had warned him to stay away from music, but Ray did not know the reason why.
He was later kidnapped by a psychotic Lucassi, who took McBreen back to the Murray Q. Frederickson Psychiatric Facility in order to perform brain surgery on him. Ray was rescued by Wuornos and Audrey Parker, who shocked Lucassi with a defibrilator.
Years later, when Audrey ended the Troubles, Ray's wife will have returned to her erratic state, being a rare case of the Troubles ending being a bad thing, for Ray in particular.