Hi, you are definitely eligible for a diploma course in forensic sciences or criminology. The eligibility criteria for these are general graduation. However, here is a list of a few of the universities in India offering such courses.

You may check the respective websites for details about the course, eligibility criteria and the admission procedures.

1.      Bundelkhand University http://www.bujhansi.org/: offers PG Diploma in Forensic Science and Criminology for which the eligibility is B.Sc (Bio/ Math)/ LLB (In-service persons).

2.      University of Pune http://www.unipune.ernet.in/indexout.html: offers Diploma in Criminology (DIC)

3.      University of Delhi http://www.du.ac.in/: offers PG Diploma in Forensic Science.

All the best.