No. You can ask for a report, but they are not required to provide one.
Hire an attorney for your case and they will subpoena it. Or file a FOIA.
If the case is "still under investigation" police have no legal obligation to provide you any documentation, including police investigation reports. If the case is closed, the reports would be public data that must be released (unless they are sealed by court order). I've seen cases held "under investigation" for years. Find out how police are designating the case. Police sometimes give reports to attorneys that they won't give to the general public.