Q. This is an excerpt from an investigative report:

Officer Doe said that Sgt. Smith takes sleeping pills while on duty. Officer Jones stated that on a couple of occasions, Sgt. Smith gave him sleeping pills to help him relax. When asked what time of day he would take these pills, Officer Jones responded, around 11:30 p.m.

It was unclear to me who he referred to, and I asked the writer for clarification. The answer I received from the writer was “The pronoun he refers to the last male proper name mentioned, therefore Jones, but I’ll make it clearer.” I had not heard this before. Is this a rule of writing?