The Man Who Turned To Stone 1957 (aka..The Petrified Man

The Man Who Turned to Stone (a.k.a. The Petrified Man) is a 1957 American black-and-white horror science fiction film directed by László Kardos and starring Victor Jory, Ann Doran and Charlotte Austin.[2] The screenplay was written by Bernard Gordon under his pen name Raymond T. Marcus. The Man Who Turned to Stone was released in 1957 on a double bill with another Katzman-produced film, Zombies of Mora Tau.
Two social workers, Dr. Jess Rogers and Carol Adams grow concerned over the number of deaths of young women at the La Salle Detention Home for Girls. The otherwise healthy inmates have been dying of heart failure or suicide. The social workers meet the manager of the detention home, Dr. Murdock.
Tracy, one of the inmates, discovers a hidden laboratory. The lab is the base for a group of unethical doctors who learned a hundred years ago to extend their lives by draining the vitality of others. Without such transfusions, they begin to slowly petrify. They have become the medical staff of doctors at the home, assuring a steady supply of vital young bodies to feed upon.
Rogers and Adams begin a quiet investigation, eventually exposing the doctors and their crimes and saving future victims.