When I give him a glass of water, the officer gets mad at me. Why

Hint 1 of 8:

I assume you already did "TAKE Glass" (the one sitting in bathroom) ?

Hint 2 of 8:

Don't use the water from the bathroom sink; look elsewhere.

Hint 3 of 8:

Have you looked south of the bathroom ?

Hint 4 of 8:

Go to where the officer was in the hall & go down to next screen.

Hint 5 of 8:

Enter door in middle of screen.