The cache is not at the posted coordinates! Do not go there or you may get murdered by traffic!
Since Adventure Labs are now a common feature of geocaching, I will dispense with the customary explanation of what they are and what type of hardware you will need to complete one. I will, however, provide you with a link and a QR code for this particular Adventure Lab.
Middlefield Murder Mystery Adventure Lab

Due to the nature of this Adventure, I must first provide the following disclaimer:
Absolutely no geocachers, real or virtual, were harmed in any way during the creation of this Adventure Lab!
Special thanks go out to the Eastern Chums who graciously agreed to act as the suspects in this murder mystery. You will become familiar with each of them throughout this adventure, but just pray that you don’t meet any of them in a dark alley somewhere!
Completing this Adventure Lab should be relatively easy, probably requiring about one to two hours, unless you linger at any of the stops in and around the Middlefield area. If you plan on solving the mystery and finding the bonus cache though, you will really need to tap into your inner gumshoe, and use all of your powers of observation, reasoning, and deduction.
Note that you will need the information from all of the journals in the Adventure Lab to solve the mystery, including the associated pictures. If your wifi connection is slow, you may need to wait several seconds for the pictures to download. Don't forget to go back and review the final journal, which is bypassed when you first complete the Adventure Lab.
Once you have solved the crime by determining which location, suspect, and weapon you have not yet seen, adjustments to the posted coordinates on this page will give you the final coordinates for the bonus cache.
(Read that sentence again. It's very important!)
This Adventure Lab is best done during daylight hours, and the bonus cache is only available during the day. No night caching!
Finally, I ask that you do not give away any of the secrets you discover when you post your find logs. That way all geocachers can enjoy solving the mystery themselves during the Adventure Lab.
Good luck!

Va gur purpxre . . .