It came to me then that the one who murdered him was you.
4 seconds sound clip from the Strife for Mastery (1978) movie soundboard.
You can hear this line at 01:16:58.556 in the DVD version of the movie.
Quote context
[...]
- I think that the time has come.
- Yes, you're right. In fact, the time has come.
- Don't get it. I don't get it. So many have to die because of one man's obsession.
- Tell me, how'd you kill my dad?
- What? How do you know that I did kill him?
- It was just after I visited the Galaxy Fort.
- It came to me then that the one who murdered him was you.
- Apart from the two of us, I mean, that's my brother and I, only you could have killed my father.
- Ha ha ha ha ha! That's true. And that did help.
- A good man can easily deceive.
- You know, you aren't a bad man, though, because you're not a man. You're the worst kind of animal.
- You can curse me because you haven't got much time left to curse.
[...]