With a forensic science degree with a concentration in biology, what is to be expected job-wise?

I intend to major in forensic science (biology, not chemistry), but even after quite a lot of research, I'm finding it quite difficult figuring out what exactly one does if they have biology as the concentration (for the major). I prefer biology over chemistry, so I'm just wondering if a major in forensic biology would allow me to collect and possibly analyze trace evidence such as fingerprints, blood, fibers, etc. I've also found that crime scene technicians/investigators are usually just police officers who've been working for many years and are given the job of collecting evidence, so does this mean I would first have to become an officer before I can work at crime scenes? I know this is a lot, but I'm really interested in the collecting aspect (more so trace evidence than DNA) , so would a major in forensic biology allow me to work in both a lab and at crime scenes? I also have one more question. A lot of sources claim that forensic chemists work primarily in labs, so I was wondering if this is true for forensic biologists as well. #biology #chemistry #forensics #laboratory #forensic-analysis #crime-scene-investigator #analyst #evidence