Movies and TvShows featuring "no-one-believes-the-witness" theme.

A boy and his stepmother fear for their safety after an eerie creature resembling the boy's recently deceased father visits them.

Eyewitness follows a young boy who becomes an eyewitness to a political assassination. However, no one believes him or takes his claims seriously. With danger and corruption lurking around every corner, the boy finds himself on the run, trying to escape the clutches of a killer. As he navigates through a web of deceit and violence, he must rely on his own wit and bravery to survive.

If it wasn't British, this would be in the Forgotten Horrors book. Hugh (Inspector Holt in HUMAN MONSTER) has some valuable jewels stolen. They're hidden in the back of an old clock in an antique shop. When the thieves return for them, the clock has been sold! They trace it to a creepy country estate. When Hugh and the niece of one of the crooks also show up, things get hairy.