When a police officer fires his gun, he must fill out a lot of paperwork.

Correct pronoun errors? I don't see any.

2 answers

I don't see any errors -- assuming that the police officer is male.

I suggest changing the sentence to:

When police officers fire their guns, they must fill out a lot of paperwork.
The structure of the sentence leads to an unclear image in terms of timing. I would add to Ms. Sue's version of the sentence.

When police officers fire their guns, later they must fill out a lot of paperwork.

Although I may be unique in my imagery, I had the image of "Bang, write, bang, write, etc." Adding "later" avoids this image.