Yes.
But shoplifting gum is not called "murder" either.
Either the word "torture" has a real meaning, or it doesn't. We can legitimately argue about where the line is, but there should be a line. Isolation cells are not "torture." Neither is humiliation. I have been convinced that waterboarding is.
If you look at the interrogation log, refusal to accept water, food, or medicine was a large factor in the discomfort of this particular prisoner.