Carson City's forensics have come a long away from the Chevy Nova being driven around as the mobile crime lab.Dean Higman, the Carson City Sheriff's Office senior forensics specialist, shepherded the Nova to greener pastures and has seen the mobile crime lab expand to its current, modern state.The mobile crime lab — now in a white sports utility vehicle — is not the only thing to have changed during Higman's tenure as the real Carson City CSI, or crime scene investigator.The crime lab used to be in the basement and attended by four pumps. When one pump would break during …