I would recommend finding a college that specializes in the programs you are interested in. Two examples are Florida State University and John Jay College of Criminal Justice in New York City. Both of these colleges offer top notch education and internships in the fields you are interested in. Their professors are experienced professionals that have extensive experience in the field they are teaching and can offer unique insight and advice to their students. These schools are also able to offer unique internship opportunities for students nearing the end of their degrees.
Kimberly recommends the following next steps:
CSI’s are not law enforcement, per say, meaning they do not have arrest powers as detectives do. They only work the crime scenes. This would mean a forensic science degree.
The other option is if you go federal (ATF, DEA, FBI) you could have both worlds.
But, you have some decisions make ;)