It’s not just other publications I scold. The Sun has reporters and editors who regularly overlook a small but irritating lapse, one of which I saw in print on my day off.
To write that police have no motive for a crime is not exactly the same as to write police have no knowledge of a motive for a crime.
We usually assume that the police are not motivated to rob, burgle, carjack, stab, etc. civilians. When they do, that’s usually in the first sentence of the article, not the last.
When they don’t have a clue who did it or why, we write that they know of no motive for the act, thereby establishing a degree of precision in prose and avoiding the scowl of a cranky old editor.