Imagine your local square-jawed, earnest, clean-cut G-Man, taking that report and telling his boss that he has a crime to solve. Or, they can look for real bank robbers. Where do you think the energy is going to get spent?
That is a problem with notifying any law enforcement agency including local police and FBI. I can't imagine trying to explain this to local police and expecting them to take action. I doubt they know or care about what Bitcoin is, and the scammer probably isn't in this region. At least the FBI has made attempts to learn about bitcoin, and has a mechanism for reporting such crimes. If enough people report there, I'm sure they will take action. The UC Davis police have other reasons to investigate. Regarding the value of what was stolen, I'm pretty sure it was more than a typical bank robbery.