[null and void]

That's when I realized I didn't remember Umbridge saying she was the one who sent the dementors. Does anyone remember movie Umbridge revealing that little bit of info?

Now that you mention it, no she didn't.

[js1138]

That's when I realized I didn't remember Umbridge saying she was the one who sent the dementors. Does anyone remember movie Umbridge revealing that little bit of info?

For those who can read between the lines, her guilt is strongly implied during the trial.

At the end, there is a newspaper headline announcing an investigation of her.

Making this explicit in the movie would drag down the main plotline.