When I found you'd locked yourself in, I assumed you knew about it.

2 seconds sound clip from the The Picture of Dorian Gray movie soundboard.

You can hear this line at 00:45:50.776 in the Blu-ray version of the movie.

Quote context

[...]

- Two weeks ago, I asked Sibyl to marry me. I'm not going to break my word to her.

- Then you don't know.

- Know what?

- Haven't you read the morning papers?

- No, I haven't.

- What is it, Harry? What's happened?

- Sibyl Vane is dead.

- That's why I had her here to see you. I didn't want you to see anyone until I came.

- When I found you'd locked yourself in, I assumed you knew about it.

- There'll be an inquest and you mustn't get mixed up in it.

- They don't know your name at the theatre, I suppose, and if they don't, it's all right.

- Did Sibyl? Tell me everything, Harry.

- It was obviously not an accident. Though I suppose it must be put that way to the public.

[...]