Role and Importance of Forensic Science in Crime Investigation?

I should think this answer would be a given and not require asking. Apparently you don't watch crime shows on TV.

"Forensic scientists collect, preserve, and analyze scientific evidence during the course of an investigation. While some forensic scientists travel to the scene of the crime to collect the evidence themselves, others occupy a laboratory role, performing analysis on objects brought to them by other individuals."

www.bangerterlaw.com/the-importance-of-forensic-evidence-in-court/