The daughter of “House of Horrors” killer Gary Heidnik does not have next-friend standing to challenge her father’s sentence, the state Supreme Court has ruled, denying a stay of execution to the death row inmate.

Heidnik is scheduled to be put to death by lethal injection on July 6 at the State Correctional Institution at Rockview. In order to get next-friend standing, Heidnik’s daughter, Maxine White, had to show that her father is mentally incompetent.