It's difficult, which is hard to explain, when you wait or decide not to file charges for whatever reasons...you don't want to see the person in jail, you don't want them to lose a job, etc. You just want them to get control over their anger - help basically.
This is a good forum for support. DV isn't a pleasant thing to go through let alone acknowledge or sometimes even having open discussions about w/friends and family. However, you can come here to vent, reassess, etc. as well as get some ideas when you feel alone.
For right now, if there's an investigation, really there's nothing you can do to alter whatever they find. There would have been more of an affect way back when. I did the same thing. No record...I just wanted him to get help.
But, for yourself and even though
there's an investigation what you CAN
do is get to a DV counselor which usually lies somewhere w/in the HS department of your area or a DV hotline..
You may, depending on your area, need to go outside of that to avoid any possible biasedness.