Hit by drunk driver almost 2years ago, can i still go after him? Insurance paid off my car but not our medical bills. 2 adults & a 9 month old baby

June 6,2012 I was hit by a drunk driver and he took off on foot. My vehicle was totaled. I had my wife and 9 month old daughter in the vehicle. A witness was able to identify the suspect but Houston Police officer did not document the witness name and info. It took almost two months until we finally got HPD to go look for the witness. Until then the suspect denied being involved and said the truck was stolen. Once the witness was found finally, the suspect confessed he was the driver. Since HPD messed up, it caused us to have problems closing our case and finding out the truth that could have been resolved sooner. I have pictures of open beer canisters in the vehicle. I gave them cop on our case. No pictures were ever shown to the judge. Drunk driver was only charged with "Failure to stop and give info". Our car got totaled, medical bills and our insurance has gone way up.As a student and young father i did not and still do not know what i should do.Any information is very appreciated