I agree with Ms. Glover. We should defer this.
However, I would simply like to emphasize that my idea—and I'm not saying this is the best one, even though I thought it was when I submitted it—was to save police officers time. The idea was to encourage them to describe a way of acting succinctly, so that it would be useful.
However, Mr. Davies' suggestions would lengthen the description. The idea would be to describe the various crimes from which police officers would have to deduce the modus operandi. I'm entirely in favour of the definition in Black's Law Dictionary. I find it very comprehensive. So if we all agree to add that concept, we can do so.
Lastly, I nevertheless wanted to point out that the term "modus operandi" may perhaps appear in Webster's Dictionary, but it is definitely in the Petit Robert, which is a kind of bible for ordinary French. The term is very succinctly defined as a manner of proceeding, a method of operating. In my opinion, both expressions correspond exactly to what I wanted to add. I hope you understand the distinction with regard to what Mr. Davies is suggesting.