My question involves criminal law for the state of: Iowa

I was involved in a bar fight. Yes I had been drinking
I have emails from both the lady and her husband admitting that they both hit me and my husband and that neither of us touched them .

I was hit in the face with a beer bottle I then tackled the lady to the ground, Her husband tried to hit me so my husband held him against the wall by his throat(arm across neck) once the bouncer got between them my husband let go and the man reached around and hit my husband.

I did not go to the police that night . An officer did come to the bar, i showed him my eye, however, he did not ask if I wanted to press charges.

I called two days later on a tuesday to talk to an officer about pressing assualt charges. After i recieved threatning emails from the husband. My husband works on the road all week so i waited to go to the law center until the next weekend when he was home. However i did have pictures of my eye and the emails in hand. the officer told me that since it was in a bar and I alot to drink . That most likely nothing would be done except disorderly conduct charges on all of us..
he did take a couple of names of some witnesses from me but only contacted one lady.
he called me and said he couldn't get ahold of my witnesses, and that the other parties involved told him that my husband and i had assaulted them.. So he was going to drop it . I was really upset and told him I would do his job for him and get my other witnesses up there to fill out statements. So he agreed to that. but even after 2 other women went up and gave statements, the officer refuses to let it go to court. or let me even file charges.. i asked for a copy of the police report and copies of the statements that had been written and he told me I would have to get an attorney if i wanted them.
our town has been KNOWN for having "bad" policemen. this year our chief and his deputy were inprisoned for rape... I strongly feel that the officer is biased against me because i own the body piercing shop here in my town.
My husband and i neither one have records.. Nor have we been in fights in YEARS! like 15 + since we were in high school..
I really want to pursue this.. What do I need to do ?