Officer won't follow up on burglary
My house was broken into 3 months ago. I filed a report with the sheriff's office and they were suppose to question a few suspects. Well after a month and a half I still hadn't heard anything at all. I called and left message after message, never received no response. I finally caught up with the officer investigating my burglary. I found out who broke in my home and I finally talked with the officer and stated what I knew, but I had no actual proof at that time. About 2 weeks later I ran into someone that confirmed who broke into my home. I finally got in touch with the officer he said that the person who was my witness must come in and sign a sworn affidavit. It has since been another month since I got the sworn affidavit. I've been calling 2-3 times a week and the officer has yet to even go question this person. His excuse is he has been busy and he was going to question someone else and make sure they didn't steal my stuff. Well I think the officer is protecting this person.
What can I do about this situation? I feel like I've done more of his job than he has. Who else can I go to in order to retrieve my belongings?