The judge rules that the detectives erred in going through Dr. Allison's trash. Trash is not private.
When Briscoe and Green are questioning Dr. Matthew Allison about his wife, they ask if she was troubled by the loss of $500,000, to which he responds, "she could care less." The correct expression is she couldn't care less. If she could care less, that would mean she does care a little bit, which is the opposite of what her husband is trying to convey to the detectives.