Will these degrees work for this field?

I am currently in a Criminal Justice program. Its a Bachelor of Science: Criminal Justice-Forensic Investigations. Now the job I want to be able to pursue is a crime lab technician. I know that I need 4 years of either chemistry or biology (depending on which area I want to be in such dna, etc) Will the 4 years of science on top of the criminal justice degree be enough to be accepted for an internship or as a job as a crime lab tech?