You sound very mixed up my friend...I hope you haven't been testing Skunk for you Police Forensics entrance exam ! - Sorry.
Either way I think in leaving your uni course you really sent out the wrong signals..I as an employer would look very carefully at your CV, as I wouldn't want a quitter on my team.
You should have stuck it out, and at least got a degree and then looked at graduate intake with the Police.
You want to study Forensic's I assume, so a background in a science would be a start, but also get ready to study hard to get to where you want to be.
Why not contact your local Police headquarters and ask them for advice.