Detectives build their case on your preliminary report. Prosecutors decide whether to move forward with the case based on your report. Insurance companies, probation officers and others will use your work product to help them with their roles. Sooner or later a case will come up to the detectives and prosecutors, and they'll look to the officer to bring charges.
How do you want to be viewed by your criminal justice colleagues? You should desire to be known as the articulate officer with a keen attention to procedure and detail. You don't want the reputation of the sloppy dullard who just tries to get by with minimum effort. Make your mark here as a positive one.
Years ago, when I was a detective sergeant, I was tasked with assisting with detective applicant interviews. I would go to records management archives and make copies of the example reports for burglaries, assaults, traffic citations, and traffic accidents. I would make a copy of a daily activity report (DAR) for good measure.
Today, these could be generated at a workstation with spell check and grammar check. The dais would review the applicants' reports before we interviewed them. If you claimed to be an excellent report writer and premier preliminary investigator, the example reports would validate you.
Oftentimes the lackluster reports caused chagrin among the aspiring detectives. You never know who'll read a mundane report, and you never know what a well-written report will net you. Pay attention to the details; it will pay off in more ways than one.