Looking for movie title. Suspense. 2 boys switched at birth. One from good parents the other from criminal parents. Things start going amiss when son turns about 7, people/pets dying etc. turns out the criminal dad has been living in the attice watching his son be raised by other parents. The "good" son has been raised in an orphange.

Shaktiman??

Relative Fear (http://www.imdb.com/title/tt0110965/)