And there have been many film-inspired murders. the mass shooting inspired by the Dark Night. John Hinckley’s assassination attempt on Reagan ( inspired by Taxi Driver ).
John Lennon’s murder was inspired by The Catcher in the Rye!
Here’s a link to some:
https://www.newsweek.com/nine-horrible-real-life-crimes-were...
And remember, not all such incidents are famous. So doubtless there are more.
There are sick people in the world who are indeed influenced by all sorts of media.
this was the key idea behind A Clockwork Orange.
Whether such media influences “healthy” people is another question.