Hii!
There are rarely any Colleges, not only in Calicut University, but across Kerala offering BSc forensic science ourse. You will have to look for other options to pursue this course.
But, There are a few Colleges offering Higher level courses in forensics such as MD, MSc etc., And a few offer b.voc course too.
Some of the colleges to name, are-
* Government medical College, Thiruvananthapuram
* Government Medical College, Kozhikode
* Amrita School of medicine, Kochi
* T D Medical College, Alappuzha
Etc.,
You can visit the link given below for more information-

https://medicine.careers360.com/colleges/list-of-forensic-medicine-colleges-in-kerala

Hope this helps.
Good luck!