There are several college which offers forensic science , you just need your 12th marks to fall under their eligibility criteria which is 60 % marks .
If you satisfy this criteria you can go for any college .

The best colleges which offers bsc forensic science are :-

1. Rajiv Gandhi Centre for Biotechnology
Thiruvananthapuram, Kerala

2. Amrita School of Medicine
AIMS Ponekkara (PO),kerla

3. Kerala University of Health Sciences (KUHS)
Thrissur, Kerala

4. University of Calicut
Malappuram
Calicut, Kerala

5. T.D. Medical College
Vandanam
Alappuzha, Kerala

All the best :)