The Changeling (1980 film)

The Changeling is a 1980 Canadian psychological horror film directed by Peter Medak and starring George C. Scott and Trish Van Devere Scotts reallife wife. The story is based upon events that writer Russell Hunter said he experienced while he was living in the Henry Treat Rogers Mansion of Denver, Colorado.

However, John soon discovers that he has unexpected and unwelcome company in his new home the unhappy ghost of a murdered young boy. The ghost makes its presence felt by various phenomena such as shattering windows, abruptly opening and shutting doors, and manifesting itself dramatically during a seance. John investigates the identity of the dead child and finds that the mystery is linked to a powerful local family, the heir of which is a wealthy United States senator, Joseph Carmichael.John subsequently discovers that the real Joseph Carmichael who was born in 1900 was murdered in 1906 by his father, Richard. Joseph was a crippled, sickly child, and in the event of his death before his 21st birthday, the family fortune which in 1905, he inherited from his late maternal grandfather would pass to charity. Desperate to keep control of the fortune, Josephs father drowned young Joseph in the bathtub, secretly replaced him with a healthy orphan, and took the orphan to Europe in the guise of seeking a treatment or cure. He returned several years later with the impostor, now grown and cured of his illness, and continued as if nothing had happened. ........

Source: Wikipedia