You don't have much to say at the Morgue.

cause - anaphalectic shock, maybe a bee sting?
allergic to? hay fever
time? recent 6 hours

OK, now over to the lab with your few clues.

dirt - plant soil
stain - sap from a red oak
pollen - exotic mix of spanish bayonet, tiger aloe
tire cast - SUV / pickup

Still not too much. OK, go talk to the cops.

who? Her father is Carlo Benedetti, she's his daughter Sophia. He owns the Monico and more
when missing? last night
warrant for home? She lived with her parents, no.
Flora? pollen not in Nevada. Desert demonstration gardens.

Finally, a clue!! You can now go to the gardens.

CSI Crime scene Investigation Walkthrough