The family of double killer John Gallagher have made contact with Justice Minister Alan Shatter, asking him to detain their brother at the Central Mental Hospital indefinitely.

The man who cheated death when double killer John Gallagher’s gun jammed in his face says he fears he will have to come face to face with him again soon.

Double-killer John Gallagher would not have handed himself in unless he knew he would walk free, his victims' family has said.

Double killer John Gallagher is back in detention after handing himself over to authorities yesterday.